histograms.xml

<!--
Copyright 2020 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->

<!--
This file is used to generate a comprehensive list of Accessibility histograms
along with a detailed description for each histogram.

For best practices on writing histogram descriptions, see
https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md

Please follow the instructions in the OWNERS file in this directory to find a
reviewer. If no OWNERS file exists, please consider signing up at
go/reviewing-metrics (Googlers only), as all subdirectories are expected to
have an OWNERS file. As a last resort you can send the CL to
chromium-metrics-reviews@google.com.
-->

<histogram-configuration>

<histograms>

<variants name="AccessibilityEveryReport">
  <variant name=".EveryReport"
      summary="sent with every metrics report, and preferred for computing
               uniques"/>
</variants>

<variants name="SodaLanguageCode">
  <variant name="de-DE" summary="German language code"/>
  <variant name="en-US" summary="English language code"/>
  <variant name="es-ES" summary="Spanish language code"/>
  <variant name="fr-FR" summary="French language code"/>
  <variant name="it-IT" summary="Italian language code"/>
  <variant name="ja-JP" summary="Japanese language code"/>
</variants>

<variants name="SwitchAccessMenuAction">
  <variant name="ActionRecorder"
      summary="Switch Access Menu Action: Action Recorder"/>
  <variant name="Copy" summary="Switch Access Menu Action: Copy"/>
  <variant name="Cut" summary="Switch Access Menu Action: Cut"/>
  <variant name="Decrement" summary="Switch Access Menu Action: Decrement"/>
  <variant name="Dictation" summary="Switch Access Menu Action: Dictation"/>
  <variant name="DisplayBrightnessDown"
      summary="Switch Access Menu Action: Display Brightness Down"/>
  <variant name="DisplayBrightnessUp"
      summary="Switch Access Menu Action: Display Brightness Up"/>
  <variant name="DisplayMenu"
      summary="Switch Access Menu Action: Display Menu"/>
  <variant name="DisplayMirror"
      summary="Switch Access Menu Action: Display Mirror"/>
  <variant name="DisplayRotate"
      summary="Switch Access Menu Action: Display Rotate"/>
  <variant name="DisplayZoomIn"
      summary="Switch Access Menu Action: Display Zoom In"/>
  <variant name="DisplayZoomOut"
      summary="Switch Access Menu Action: Display Zoom Out"/>
  <variant name="EndTextSelection"
      summary="Switch Access Menu Action: End Text Selection"/>
  <variant name="ExecuteMacro"
      summary="Switch Access Menu Action: Execute Macro"/>
  <variant name="Increment" summary="Switch Access Menu Action: Increment"/>
  <variant name="ItemScan" summary="Switch Access Menu Action: Item Scan"/>
  <variant name="JumpToBeginningOfText"
      summary="Switch Access Menu Action: Jump To Beginning Of Text"/>
  <variant name="JumpToEndOfText"
      summary="Switch Access Menu Action: Jump To End Of Text"/>
  <variant name="Keyboard" summary="Switch Access Menu Action: Keyboard"/>
  <variant name="LeaveGroup" summary="Switch Access Menu Action: Leave Group"/>
  <variant name="LeftClick" summary="Switch Access Menu Action: Left Click"/>
  <variant name="MediaFastforward"
      summary="Switch Access Menu Action: Media Fastforward"/>
  <variant name="MediaMenu" summary="Switch Access Menu Action: Media Menu"/>
  <variant name="MediaMute" summary="Switch Access Menu Action: Media Mute"/>
  <variant name="MediaPlayPause"
      summary="Switch Access Menu Action: Media Play Pause"/>
  <variant name="MediaRewind"
      summary="Switch Access Menu Action: Media Rewind"/>
  <variant name="MediaVolumeDown"
      summary="Switch Access Menu Action: Media Volume Down"/>
  <variant name="MediaVolumeUp"
      summary="Switch Access Menu Action: Media Volume Up"/>
  <variant name="MoveBackwardOneCharOfText"
      summary="Switch Access Menu Action: Move Backward One Char Of Text"/>
  <variant name="MoveBackwardOneWordOfText"
      summary="Switch Access Menu Action: Move Backward One Word Of Text"/>
  <variant name="MoveCursor" summary="Switch Access Menu Action: Move Cursor"/>
  <variant name="MoveDownOneLineOfText"
      summary="Switch Access Menu Action: Move Down One Line Of Text"/>
  <variant name="MoveForwardOneCharOfText"
      summary="Switch Access Menu Action: Move Forward One Char Of Text"/>
  <variant name="MoveForwardOneWordOfText"
      summary="Switch Access Menu Action: Move Forward One Word Of Text"/>
  <variant name="MoveUpOneLineOfText"
      summary="Switch Access Menu Action: Move Up One Line Of Text"/>
  <variant name="Paste" summary="Switch Access Menu Action: Paste"/>
  <variant name="PointScan" summary="Switch Access Menu Action: Point Scan"/>
  <variant name="RightClick" summary="Switch Access Menu Action: Right Click"/>
  <variant name="ScrollDown" summary="Switch Access Menu Action: Scroll Down"/>
  <variant name="ScrollLeft" summary="Switch Access Menu Action: Scroll Left"/>
  <variant name="ScrollRight"
      summary="Switch Access Menu Action: Scroll Right"/>
  <variant name="ScrollUp" summary="Switch Access Menu Action: Scroll Up"/>
  <variant name="Select" summary="Switch Access Menu Action: Select"/>
  <variant name="Settings" summary="Switch Access Menu Action: Settings"/>
  <variant name="Shortcuts" summary="Switch Access Menu Action: Shortcuts"/>
  <variant name="StartRecording"
      summary="Switch Access Menu Action: Start Recording"/>
  <variant name="StartTextSelection"
      summary="Switch Access Menu Action: Start Text Selection"/>
  <variant name="StopRecording"
      summary="Switch Access Menu Action: Stop Recording"/>
  <variant name="SystemDiagnostics"
      summary="Switch Access Menu Action: System Diagnostics"/>
  <variant name="SystemHelp" summary="Switch Access Menu Action: System Help"/>
  <variant name="SystemLauncher"
      summary="Switch Access Menu Action: System Launcher"/>
  <variant name="SystemMenu" summary="Switch Access Menu Action: System Menu"/>
  <variant name="SystemScreenshot"
      summary="Switch Access Menu Action: System Screenshot"/>
  <variant name="SystemStatusBar"
      summary="Switch Access Menu Action: System Status Bar"/>
  <variant name="SystemTaskManager"
      summary="Switch Access Menu Action: System Task Manager"/>
  <variant name="UserLock" summary="Switch Access Menu Action: User Lock"/>
  <variant name="UserMenu" summary="Switch Access Menu Action: User Menu"/>
  <variant name="UserNextUser"
      summary="Switch Access Menu Action: User Next User"/>
  <variant name="UserPreviousUser"
      summary="Switch Access Menu Action: User Previous User"/>
  <variant name="UserSignOut"
      summary="Switch Access Menu Action: User Sign Out"/>
  <variant name="WebBookmark"
      summary="Switch Access Menu Action: Web Bookmark"/>
  <variant name="WebBottomOfPage"
      summary="Switch Access Menu Action: Web Bottom Of Page"/>
  <variant name="WebClearHistory"
      summary="Switch Access Menu Action: Web Clear History"/>
  <variant name="WebDownloads"
      summary="Switch Access Menu Action: Web Downloads"/>
  <variant name="WebFindInPage"
      summary="Switch Access Menu Action: Web Find In Page"/>
  <variant name="WebMenu" summary="Switch Access Menu Action: Web Menu"/>
  <variant name="WebTopOfPage"
      summary="Switch Access Menu Action: Web Top Of Page"/>
</variants>

<histogram name="Accessibility.ActiveTime" units="ms"
    expires_after="2022-12-25">
  <owner>aleventhal@chromium.org</owner>
  <owner>janewman@microsoft.com</owner>
  <summary>
    The amount of time accessibility was enabled and actively used. Reported
    when we switch states from active to inactive.
  </summary>
</histogram>

<histogram name="Accessibility.Android.Cache.MaxNodesInCache" units="count"
    expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks the maximum number of AccessibilityNodeInfo objects that were stored
    in the Java-side cache during a single session.
  </summary>
</histogram>

<histogram name="Accessibility.Android.Cache.PercentageRetrievedFromCache"
    units="%" expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks the percentage of calls from the Android framework to create a new
    AccessibilityNodeInfo object that were serviced from the cache rather than
    constructing the object from scratch during a single session.
  </summary>
</histogram>

<histogram name="Accessibility.Android.OnDemand.EventsDropped" units="count"
    expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>abigailbklein@google.com</owner>
  <summary>
    Tracks the number of AccessibilityEvents dropped when the OnDemand
    accessibility services feature is enabled. Recorded at the end of a session.
  </summary>
</histogram>

<histogram name="Accessibility.Android.OnDemand.OneHundredPercentEventsDropped"
    units="count" expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>abigailbklein@google.com</owner>
  <summary>
    Tracks the number of AccessibilityEvents dropped when the OnDemand
    accessibility services feature is enabled, and when the total percentage of
    dropped events is 100%. Recorded at the end of a session.
  </summary>
</histogram>

<histogram
    name="Accessibility.Android.OnDemand.OneHundredPercentEventsDropped.{AXMode}"
    units="count" expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>abigailbklein@google.com</owner>
  <summary>
    Tracks the number of AccessibilityEvents dropped when the OnDemand
    accessibility services feature is enabled, and the ComputeAXMode feature is
    enabled, and the number of events dropped is 100%. Tracks for when the
    AXMode is set to {AXMode}. Recorded a the end of a session.
  </summary>
  <token key="AXMode">
    <variant name="Basic"
        summary="kAXModeBasic - Includes only NativeAPIs and WebContents"/>
    <variant name="Complete"
        summary="kAXModeComplete - Includes NativeAPIs, WebContents,
                 InlineTextBoxes, ScreenReader, and HTML"/>
  </token>
</histogram>

<histogram name="Accessibility.Android.OnDemand.PercentageDropped" units="%"
    expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>abigailbklein@google.com</owner>
  <summary>
    Tracks the percentage of AccessibilityEvents dropped when the OnDemand
    accessibility services feature is enabled. Recorded at the end of a session.
  </summary>
</histogram>

<histogram name="Accessibility.Android.OnDemand.PercentageDropped.{AXMode}"
    units="%" expires_after="2023-07-01">
  <owner>mschillaci@google.com</owner>
  <owner>abigailbklein@google.com</owner>
  <summary>
    Tracks the percentage of AccessibilityEvents dropped when the OnDemand
    accessibility services feature is enabled, and the ComputeAXMode feature is
    enabled. Tracks for when the AXMode is set to {AXMode}. Recorded at the end
    of a session.
  </summary>
  <token key="AXMode">
    <variant name="Basic"
        summary="kAXModeBasic - Includes only NativeAPIs and WebContents"/>
    <variant name="Complete"
        summary="kAXModeComplete - Includes NativeAPIs, WebContents,
                 InlineTextBoxes, ScreenReader, and HTML"/>
  </token>
</histogram>

<histogram name="Accessibility.Android.ScreenReader{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks whether a screen reader is enabled on Android (e.g. Talkback). This
    is checked once, 45 seconds after startup. Note: prefer
    Accessibility.Android.ScreenReader.EveryReport when querying for unique
    users, as it is logged more frequently. {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.Android.TabSwitcherPreferenceEnabled"
    enum="BooleanEnabled" expires_after="M81">
  <owner>twellington@chromium.org</owner>
  <owner>tedchoc@chromium.org</owner>
  <summary>
    Tracks whether the accessibility tab switcher is enabled when an
    accessibility service (e.g. TalkBack or Switch Access) is enabled that would
    typically cause the accessibility tab switcher to be used. Recorded when the
    activity is resumed or accessibility services are turned on.
  </summary>
</histogram>

<histogram name="Accessibility.Android.UserFontSizePref.Change" units="%"
    expires_after="2023-07-01">
  <owner>twellington@chromium.org</owner>
  <owner>skym@chromium.org</owner>
  <summary>
    Records the current user font size pref when exiting accessibility settings
    if the preference was changed. The font size ranges from 50% to 200% and can
    be set in increments of 5%; the default is 100%.
  </summary>
</histogram>

<histogram name="Accessibility.Android.UserFontSizePref.OnStartup" units="%"
    expires_after="2023-07-01">
  <owner>twellington@chromium.org</owner>
  <owner>skym@chromium.org</owner>
  <summary>
    Records the current user font size pref during deferred startup for
    ChromeActivity. The font size ranges from 50% to 200% and can be set in
    increments of 5%; the default is 100%.
  </summary>
</histogram>

<histogram name="Accessibility.AndroidServiceInfo"
    enum="AccessibilityAndroidServiceInfoEnum" expires_after="2022-11-18">
  <owner>aleventhal@chromium.org</owner>
  <owner>mschillaci@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks flags and capabilities of enabled accessibility services. Recorded
    every time an Android web content view first creates a virtual view
    hierarchy, indicating that some accessibility service is running. The number
    of emits of this histogram won't be as useful as the unique user counts. The
    primary purpose of this is to guide optimization by determining what
    capabilities of accessibility services are widespread and which ones are
    relatively rare.
  </summary>
</histogram>

<histogram name="Accessibility.ATK-APIs" enum="AccessibilityATKAPIEnum"
    expires_after="2022-11-18">
  <owner>jdiggs@chromium.org</owner>
  <owner>jkim@igalia.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks usage of ATK APIs on Linux Desktop. Recorded when ATK APIs that are
    supposed to trigger AX mode enabled is called.
  </summary>
</histogram>

<histogram name="Accessibility.AutoDisabled.DisabledTime" units="ms"
    expires_after="2022-12-25">
  <owner>abigailbklein@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The total amount of time accessibility was disabled due to being
    auto-disabled, before being enabled again.
  </summary>
</histogram>

<histogram name="Accessibility.AutoDisabled.EnabledTime" units="ms"
    expires_after="2022-12-25">
  <owner>abigailbklein@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The total amount of time accessibility was enabled before being
    auto-disabled.
  </summary>
</histogram>

<histogram name="Accessibility.AutoDisabled.EventCount" units="count"
    expires_after="2022-12-25">
  <owner>abigailbklein@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The number of user input events that were received within one time window,
    without any accompanying accessibility API usage, that triggered
    accessibility to be auto-disabled.
  </summary>
</histogram>

<histogram name="Accessibility.CaptionSettingsLoadedFromPrefs"
    enum="BooleanEnabled" expires_after="2022-10-18">
  <owner>evliu@google.com</owner>
  <owner>media-dev@chromium.org</owner>
  <summary>
    Whether custom caption settings were loaded from the user preferences.
    Recorded when WebKit preferences are overridden.
  </summary>
</histogram>

<histogram name="Accessibility.CaptionSettingsLoadedFromSystemSettings"
    enum="BooleanEnabled" expires_after="2022-10-18">
  <owner>evliu@google.com</owner>
  <owner>media-dev@chromium.org</owner>
  <summary>
    Whether custom caption settings were loaded from the system preferences.
    Recorded when WebKit preferences are overridden.
  </summary>
</histogram>

<histogram name="Accessibility.ChromeVox.PerformGestureType"
    enum="ChromeVoxGestureType" expires_after="2023-02-06">
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    A user can control ChromeVox via a variety of gestures on the touch screen.
    For example, swiping right with one finger causes ChromeVox to navigate to
    the next object. Track all possible gestures here.
  </summary>
</histogram>

<histogram name="Accessibility.CrosAlwaysShowA11yMenu" enum="BooleanEnabled"
    expires_after="2022-11-18">
  <owner>dtseng@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Accessibility Menu is set to be shown regardless of
    the state of a11y features.(logged once 45 secs after startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosAutoclick" enum="BooleanEnabled"
    expires_after="2023-07-01">
  <owner>kenjibaheux@google.com</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Autoclick feature is on (logged once 45 secs after
    startup). Warning: this histogram was expired 2021-12-31 to 2022-07-07, data
    might be missing.
  </summary>
</histogram>

<histogram name="Accessibility.CrosAutoclick.TrayMenu.ChangeAction"
    enum="AutoclickActionType" expires_after="2023-04-24">
  <owner>katie@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Recorded when a user has picked a new autoclick action type from the bubble
    menu.
  </summary>
</histogram>

<histogram name="Accessibility.CrosCaretHighlight" enum="BooleanEnabled"
    expires_after="2023-04-24">
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS caret highlighting is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosCursorColor" enum="BooleanEnabled"
    expires_after="2023-04-10">
  <owner>dtseng@chromium.org</owner>
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS feature to colorize the cursor is enabled (logged once
    45 secs after startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosCursorHighlight" enum="BooleanEnabled"
    expires_after="2022-11-18">
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS cursor highlighting is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosDictation" enum="BooleanEnabled"
    expires_after="2022-12-25">
  <owner>anastasi@google.com</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the ChromeOS dictation feature is enabled (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosDictation.Language" enum="LocaleCodeISO639"
    expires_after="2022-12-25">
  <owner>katie@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The language used for speech recognition in dictation on ChromeOS. This is
    logged each time Dictation is toggled on. From M99 to M104 this was logged
    using base::PersistantHash instead of base::HashMetricName; data from that
    period can be decoded using a map between the two hashing functions. See
    crbug.com/1342966.
  </summary>
</histogram>

<histogram
    name="Accessibility.CrosDictation.ListeningDuration.NetworkRecognition"
    units="ms" expires_after="2022-12-25">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Duration that the network speech recognition service was listening for
    dictation. Recorded each time a user toggles dictation on until dictation is
    stopped, either by the user action, error, or timeout.
  </summary>
</histogram>

<histogram
    name="Accessibility.CrosDictation.ListeningDuration.OnDeviceRecognition"
    units="ms" expires_after="2022-12-25">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Duration that the on-device speech recognition service was listening for
    dictation. Recorded each time a user toggles dictation on until dictation is
    stopped, either by the user action, error, or timeout.
  </summary>
</histogram>

<histogram name="Accessibility.CrosDictation.MacroFailed"
    enum="CrosDictationMacroName" expires_after="2023-01-30">
  <owner>akihiroota@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>Recorded whenever Dictation fails to perform a macro.</summary>
</histogram>

<histogram name="Accessibility.CrosDictation.MacroRecognized"
    enum="CrosDictationMacroName" expires_after="2023-01-30">
  <owner>akihiroota@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>Recorded whenever Dictation recognizes a macro.</summary>
</histogram>

<histogram name="Accessibility.CrosDictation.MacroSucceeded"
    enum="CrosDictationMacroName" expires_after="2023-01-30">
  <owner>akihiroota@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>Recorded whenever Dictation successfully performs a macro.</summary>
</histogram>

<histogram name="Accessibility.CrosDictation.ToggleDictationMethod"
    enum="CrosDictationToggleDictationMethod" expires_after="2023-01-15">
  <owner>anastasi@google.com</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>Records how users invoke Dictation.</summary>
</histogram>

<histogram name="Accessibility.CrosDictation.UsedOnDeviceSpeech"
    enum="BooleanUsage" expires_after="2022-12-25">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    When Dictation was toggled on, records whether on-device speech recognition
    was used. If on-device recognition was not used, network speech was used.
  </summary>
</histogram>

<histogram name="Accessibility.CrosDockedMagnifier" enum="BooleanEnabled"
    expires_after="2023-04-10">
  <owner>dtseng@chromium.org</owner>
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Docked Magnifier feature is on (logged once 45 secs
    after startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosFocusHighlight" enum="BooleanEnabled"
    expires_after="2022-05-01">
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS focus highlighting is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosHighContrast" enum="BooleanEnabled"
    expires_after="2023-04-10">
  <owner>dtseng@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS High Contrast mode feature is on (logged once 45 secs
    after startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosLargeCursor" enum="BooleanEnabled"
    expires_after="2023-01-22">
  <owner>dtseng@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Large Cursor feature is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosLargeCursorSize" units="dip"
    expires_after="2022-11-21">
  <owner>sarakato@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Cursor size of the Chrome OS Large Cursor (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosScreenMagnifier" enum="BooleanEnabled"
    expires_after="2023-01-22">
  <owner>dtseng@chromium.org</owner>
  <owner>josiahk@google.com</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Screen Magnifier feature is on (logged once 45 secs
    after startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak" enum="BooleanEnabled"
    expires_after="2023-03-23">
  <owner>dtseng@chromium.org</owner>
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS select-to-speak is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.BackgroundShading"
    enum="BooleanEnabled" expires_after="2023-03-23">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether Select-to-Speak had background shading enabled when activated.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.BubbleDismissMethod"
    enum="CrosSelectToSpeakActivationMethod" expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    When Select-to-speak is active, the user can dismiss the bubble menu in
    multiple ways: by clicking the cancel button on the Select-to-speak menu or
    using keyboard shortcuts. Track the methods here.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.EnhancedNetworkVoices"
    enum="BooleanEnabled" expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether enhanced network TTS voices were enabled when Select-to-Speak was
    activated.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.NavigationControls"
    enum="BooleanEnabled" expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether Select-to-Speak's navigation controls were on when activated.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.OverrideSpeechRateMultiplier"
    enum="CrosSelectToSpeakOverrideSpeechRateMultiplier"
    expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The multiplier with which the user overrode the speech rate setting in
    Select-to-Speak. By default, the global Text-to-Speech setting is used,
    which the user can temporarily override. The override multiplier is stored
    as a sparse histogram with values (100 * multiple). For example, a speech
    rate multiplier of 1.0 (default) will be seen as 100. Emitted once every
    time playback starts, including on resume after pause or change of
    selection.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.ParagraphNavigationMethod"
    enum="CrosSelectToSpeakActivationMethod" expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    When Select-to-speak is active, the user can navigate between paragraphs in
    multiple ways: by clicking the navigation buttons on the Select-to-speak
    menu or using keyboard shortcuts. Track the methods here.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.SentenceNavigationMethod"
    enum="CrosSelectToSpeakActivationMethod" expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    When Select-to-speak is active, the user can navigate between sentences in
    multiple ways: by clicking the navigation buttons on the Select-to-speak
    menu or using keyboard shortcuts. Track the methods here.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.StartSpeechMethod"
    enum="CrosSelectToSpeakStartSpeechMethod" expires_after="2023-03-23">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    A user may activate Select-to-Speak by holding down 'search' and clicking or
    dragging a region with the mouse, or by highlighting an area and using
    search + s to read just the highlighted area. Track the methods here.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.StateChangeEvent"
    enum="CrosSelectToSpeakStateChangeEvent" expires_after="2023-03-23">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    A user has tapped a button in the tray to change Select-to-Speak's state.
    The tap was interpreted by Select-to-Speak as a request to start selection,
    to cancel speech, or to cancel selection, depending on Select-to-Speak's
    internal state when the tap occured. This tracks when the button was tapped
    and the event that it generated.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSelectToSpeak.TtsEngineUsed"
    enum="CrosSelectToSpeakTtsEngineUsed" expires_after="2023-03-23">
  <owner>ajitnarayanan@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Which TTS engine was used for making TTS requests from Select-to-speak. This
    is recorded every time a new speech request is made in Select-to-speak. Note
    that this is only recorded on the start of speech, so it is not recorded,
    for example, when the user resumes speech after pausing it.
  </summary>
</histogram>

<histogram
    name="Accessibility.CrosShelfNavigationButtonsInTabletModeChanged.OOBE"
    enum="BooleanEnabled" expires_after="2021-07-27">
  <owner>gzadina@google.com</owner>
  <owner>tbarzic@chromium.org</owner>
  <summary>
    The value for shelf navigation buttons setting set by the user during OOBE.
    The metric will be reported after the setting has been stable for 10
    seconds, or the OOBE screen in which the value can be set is closed (if the
    setting changes multiple times in quick succession, only the final value
    will be reported).
  </summary>
</histogram>

<histogram
    name="Accessibility.CrosShelfNavigationButtonsInTabletModeChanged.OsSettings"
    enum="BooleanEnabled" expires_after="2021-10-25">
  <owner>gzadina@google.com</owner>
  <owner>tbarzic@chromium.org</owner>
  <summary>
    The value for shelf navigation buttons setting set by the user in Chrome OS
    Settings page. The metric will be reported after the setting change has been
    stable for 10 seconds, or the settings window in which the value is set gets
    closed (if the setting changes multiple times in quick succession, only the
    final value will be reported).
  </summary>
</histogram>

<histogram name="Accessibility.CrosSpokenFeedback{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="2022-11-18">
  <owner>dtseng@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>aleventhal@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Spoken Feedback feature is on (logged once 45 secs
    after startup). Note: prefer Accessibility.CrosSpokenFeedback.EveryReport
    when querying for unique users, as it is logged more frequently.
    {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.CrosStickyKeys" enum="BooleanEnabled"
    expires_after="2022-11-18">
  <owner>dtseng@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>tengs@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Sticky Keys feature is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess" enum="BooleanEnabled"
    expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS switch access is on (logged once 45 secs after
    startup).
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.AutoScan" enum="BooleanEnabled"
    expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The value of the Switch Access &quot;Auto Scan&quot; setting, logged
    immediately after toggling. This will show us how often users are turning
    the feature on, and how often they are turning it back off again.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.AutoScan.KeyboardSpeedMs"
    units="ms" expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Measures the user-set speed for scanning between keyboard keys in Switch
    Access, logged immediately after changing the setting. Values range from 1ms
    to 10000ms, in 100ms buckets.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.AutoScan.SpeedMs" units="ms"
    expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Measures the user-set speed for auto scanning between items in Switch
    Access, logged immediately after changing the setting. Values range from 1ms
    to 10000ms, in 100ms buckets.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.Error"
    enum="CrosSwitchAccessError" expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Switch Access error occurred. See CrosSwitchAccessError enum for error
    types.
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.NextKeyCode" enum="KeyCode"
    expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Which key code user has assigned to the Next Action (e.g. 32 for the Space
    key)
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.PreviousKeyCode" enum="KeyCode"
    expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Which key code user has assigned to the Previous Action (e.g. 32 for the
    Space key)
  </summary>
</histogram>

<histogram name="Accessibility.CrosSwitchAccess.SelectKeyCode" enum="KeyCode"
    expires_after="2023-03-28">
  <owner>dtseng@chromium.org</owner>
  <owner>anastasi@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Which key code user has assigned to the Select Action (e.g. 32 for the Space
    key)
  </summary>
</histogram>

<histogram name="Accessibility.CrosVirtualKeyboard" enum="BooleanEnabled"
    expires_after="2023-04-17">
  <owner>dtseng@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome OS Virtual Keyboard feature is on (logged once 45 secs
    after startup).
  </summary>
</histogram>

<histogram name="Accessibility.FocusHighlight.ToggleEnabled"
    enum="BooleanEnabled" expires_after="never">
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The value of the &quot;show a quick focus highlight&quot; setting, logged
    immediately after toggling. This will show us how often users are turning
    the feature on, and how often they are turning it back off again.
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels" enum="BooleanEnabled"
    expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome accessibility image label setting is on (logged once 45
    secs after startup).
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.Android" enum="BooleanEnabled"
    expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome accessibility image label setting is on for Android
    (logged once 45 secs after startup).
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.Android.DialogOption"
    enum="AccessibilityImageLabelModeAndroid" expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    When a user opens the accessibility image label dialog on Android, records
    what option they select on user interaction.
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.Android.OnlyOnWifi"
    enum="BooleanEnabled" expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Chrome accessibility image label setting for Android is set to
    only be enabled on a Wi-Fi connection (logged once 45 secs after startup).
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.ModalDialogAccepted"
    enum="BooleanAccepted" expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    Whether a user accepts or does not accept a modal dialog enabling the image
    labels option. If the user does not accept it this does not track whether
    they closed it with the negative button, the close button, or keyboard
    escape.
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.PageLanguage" enum="LanguageName"
    expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The language of a web page where image labels were requested, as detected by
    Chrome (not necessarily what language the page claims to be in).
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.RequestLanguage" enum="LanguageName"
    expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The language that was requested for image descriptions, based on the page
    language, the user's accept languages and top languages, and the server
    languages.
  </summary>
</histogram>

<histogram name="Accessibility.ImageLabels.{Result}By{Dimension}"
    units="pixels" expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Counts the number of images that got a certain result from automatic image
    labeling (empty, error, or success), as a function of the function of one of
    the image's dimensions - either the min or the max dimension.
  </summary>
  <token key="Result">
    <variant name="Empty"/>
    <variant name="Error"/>
    <variant name="Success"/>
  </token>
  <token key="Dimension">
    <variant name="MaxDimension"/>
    <variant name="MinDimension"/>
  </token>
</histogram>

<histogram name="Accessibility.ImageLabels.{Result}By{Length}"
    units="characters" expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>mschillaci@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Counts the number of images that got a certain result from automatic image
    labeling (empty, error, or success), as a function of the function of the
    length of the characters in the image's name - either the original name, or
    the name after removing stopwords.
  </summary>
  <token key="Result">
    <variant name="Empty"/>
    <variant name="Error"/>
    <variant name="Success"/>
  </token>
  <token key="Length">
    <variant name="NameLength"/>
    <variant name="NonStopNameLength"/>
  </token>
</histogram>

<histogram name="Accessibility.InactiveTime" units="ms"
    expires_after="2023-01-15">
  <owner>aleventhal@chromium.org</owner>
  <owner>abigailbklein@chromium.org</owner>
  <owner>janewman@microsoft.com</owner>
  <summary>
    The amount of time accessibility was enabled but not actively used. Reported
    when we switch states from inactive to active. This histogram will not be
    logged if the auto-disable accessibility feature is enabled.
  </summary>
</histogram>

<histogram name="Accessibility.iOS.NewLargerTextCategory" enum="BooleanHit"
    expires_after="2022-10-16">
  <owner>gambard@chromium.org</owner>
  <owner>rkgibson@google.com</owner>
  <summary>
    This metric is related to the Preferred Content Size chosen by the user. It
    is only recorded once per session. This is hit if the chosen category is not
    listed in the map defined in
    /ios/chrome/browser/ui/util/dynamic_type_util.mm. In that case, we should
    update the code by adding an entry for the new category in that map. This is
    logged when the helper to returning the multiplier associated with the
    current preferred content size is called.
  </summary>
</histogram>

<histogram name="Accessibility.LanguageDetection.CountDetectionAttempted"
    units="count" expires_after="2021-11-19">
  <owner>chrishall@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    The number of nodes on this page for which language detection was attempted.
  </summary>
</histogram>

<histogram name="Accessibility.LanguageDetection.CountLabelled" units="count"
    expires_after="2021-11-19">
  <owner>chrishall@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    The number of nodes on this page for which a detected language was
    successfully assigned.
  </summary>
</histogram>

<histogram name="Accessibility.LanguageDetection.LangsPerPage" units="count"
    expires_after="2022-05-01">
  <owner>chrishall@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    The number of unique languages which were detected to be the most probable
    language for at least one node on the page, regardless of whether a detected
    language was assigned for that node.
  </summary>
</histogram>

<histogram name="Accessibility.LanguageDetection.PercentageLabelledWithTop"
    units="%" expires_after="2021-11-19">
  <owner>chrishall@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    Of the nodes which had a detected language assigned, the percentage for
    which the assigned language was the language detected as having the highest
    probability.
  </summary>
</histogram>

<histogram name="Accessibility.LanguageDetection.PercentageLanguageDetected"
    units="%" expires_after="2021-11-19">
  <owner>chrishall@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    Of the nodes for which language detection was attempted, the percentage for
    which a language was successfully assigned.
  </summary>
</histogram>

<histogram name="Accessibility.LanguageDetection.PercentageOverridden"
    units="%" expires_after="2021-11-19">
  <owner>chrishall@chromium.org</owner>
  <owner>dtseng@chromium.org</owner>
  <summary>
    Of the nodes for which a detected language was successfully assigned, the
    percentage where the assigned language differs from the author-provided
    language.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption" enum="BooleanEnabled"
    expires_after="2023-06-13">
  <owner>katie@chromium.org</owner>
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Live Caption feature is enabled. This is logged once, 45 seconds
    after startup.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.AudioPropertyChanged"
    enum="BooleanEnabled" expires_after="2023-06-13">
  <owner>katie@chromium.org</owner>
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the sample rate or channel count of a Live Caption audio stream
    changed midstream. This is logged once per audio stream on the destruction
    of the Cloud speech recognition client.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.CaptionBubbleError"
    enum="CaptionBubbleErrorType" expires_after="2023-06-13">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Records when the caption bubble displays an error. This is logged once each
    time the caption bubble model encounters an error.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.Duration.CaptionBubble{Visibility}2"
    units="ms" expires_after="2023-06-13">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Measures how long SODA was running while the Live Caption UI was
    {Visibility}. Logged once on the destruction of the
    SpeechRecognitionRecognizerImpl.
  </summary>
  <token key="Visibility">
    <variant name="Hidden"
        summary="hidden. This might be because it was closed by user or
                 because there was an error passing transcriptions to the UI"/>
    <variant name="Visible" summary="visible and showing transcriptions"/>
  </token>
</histogram>

<histogram name="Accessibility.LiveCaption.EnableFrom{Entrypoint}"
    enum="BooleanEnabled" expires_after="2023-06-13">
  <owner>katie@chromium.org</owner>
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Records when a user enables or disables the Live Caption feature from
    {Entrypoint}.
  </summary>
  <token key="Entrypoint">
    <variant name="GlobalMediaControls"
        summary="global media controls (Zenith)"/>
    <variant name="Settings" summary="chrome://settings"/>
  </token>
</histogram>

<histogram name="Accessibility.LiveCaption.ExpandBubble"
    enum="LiveCaptionExpandBubbleEvent" expires_after="2023-06-13">
  <owner>katie@chromium.org</owner>
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Records when a user expands or collapses the Live Caption bubble.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.FeatureEnabled"
    enum="BooleanEnabled" expires_after="2023-06-13">
  <owner>katie@chromium.org</owner>
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the Live Caption feature flag is enabled. This is logged once at the
    time of component registration.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.LoadSodaErrorCode"
    enum="WinGetLastError" expires_after="2023-06-13">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The error code of a failed attempt to load the Speech On-Device API (SODA)
    binary. This is logged once for each media stream if the SODA binary failed
    to load on Windows.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.LoadSodaResult"
    enum="LoadSodaResult" expires_after="2023-06-13">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The result of an attempt to load the Speech On-Device API (SODA) binary.
    This is logged once for each media stream when the SODA binary is loaded.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.Session2"
    enum="LiveCaptionSessionEvent" expires_after="2023-06-13">
  <owner>katie@chromium.org</owner>
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Logged when the Live Caption bubble appears and disappears. Stream start
    indicates when the bubble appears due to an audio session starting. Stream
    end indicates when the bubble disappears due to a tab change, a navigation,
    or the audio session ending and the bubble fading out due to inactivity.
    Close button clicked indicates when the bubble disappears due to a user
    clicking the close button on the caption bubble.
  </summary>
</histogram>

<histogram
    name="Accessibility.LiveCaption.SodaVerificationFailureMissingIndicatorFile"
    enum="Boolean" expires_after="2023-06-13">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the verification of the Speech On-Device API (SODA) component failed
    due to a mismatch of the component architecture. Logged once during the
    verification step of the SODA component installation on Windows only.
  </summary>
</histogram>

<histogram name="Accessibility.LiveCaption.SpeechRecognitionServiceLanguage"
    enum="SodaLanguageCode" expires_after="2023-06-13">
  <owner>evliu@google.com</owner>
  <owner>chrome-media-ux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The language code used to initialize the speech recognition service. Logged
    once when getting the Speech On-Device API (SODA) config path to use with
    the speech recognition service.
  </summary>
</histogram>

<histogram name="Accessibility.Mac.ScreenReader{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks whether a screen reader is enabled on Mac (e.g. VoiceOver). This is
    logged once, 45 seconds after startup. Note: prefer
    Accessibility.Mac.ScreenReader.EveryReport when querying for unique users,
    as it is logged more frequently. {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.ManuallyEnabled" enum="BooleanEnabled"
    expires_after="2023-01-01">
  <owner>aleventhal@chromium.org</owner>
  <owner>kenjibaheux@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether Chrome has enabled accessibility support because the user passed the
    --force-renderer-accessibility flag on the command-line (logged once 45 secs
    after startup).
  </summary>
</histogram>

<histogram name="Accessibility.ModeFlag" enum="AccessibilityModeFlagEnum"
    expires_after="2022-12-18">
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether individual accessibility mode flags are set. Tracked when each mode
    flag is flipped from false to true. These flags are flipped automatically
    when software communicates with Chrome via accessibility APIs. Flags can
    only be flipped off by advanced users or for debugging using
    chrome://accessibility/ - and that isn't tracked in this histogram.
  </summary>
</histogram>

<histogram name="Accessibility.OOBEStartupSoundDelay" units="ms"
    expires_after="never">
<!-- expires-never: Core metric for monitoring OOBE accessibility status. -->

  <owner>lpalmaro@chromium.org</owner>
  <owner>jessejames@chromium.org</owner>
  <owner>rsorokin@chromium.org</owner>
  <owner>alemate@chromium.org</owner>
  <owner>cros-oac@google.com</owner>
  <summary>
    Delay between login_prompt_visible and Chrome OS OOBE startup sound
    playback. Depends on sound subsystem initialization time.
  </summary>
</histogram>

<histogram name="Accessibility.PDF.HasAccessibleText" enum="BooleanExists"
    expires_after="2022-12-25">
  <owner>dtseng@chromium.org</owner>
  <owner>nektar@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    When a PDF is constructed for accessibility, true if any page of the PDF
    contains any accessible text derived from a text run. Note that a PDF
    containing a mix of images and text will record true even though the images
    may themselves contain inaccessible text.
  </summary>
</histogram>

<histogram name="Accessibility.Performance.HandleAXEvents" units="ms"
    expires_after="2023-01-22">
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks time spent on the browser main thread handling accessibility events
    sent from the renderer process. Logged each time the method is run without
    returning early.
  </summary>
</histogram>

<histogram name="Accessibility.Performance.ProcessDeferredAccessibilityEvents"
    units="ms" expires_after="2023-01-01">
  <owner>aleventhal@chromium.org</owner>
  <owner>janewman@microsoft.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks time spent on the render process processing deferred accessibility
    events. Logged each time the method is run during the accessbility document
    lifecycle.
  </summary>
</histogram>

<histogram name="Accessibility.Performance.SendPendingAccessibilityEvents"
    units="ms" expires_after="2023-01-01">
  <owner>aleventhal@chromium.org</owner>
  <owner>janewman@microsoft.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks time spent on the render process sending pending accessibility
    events. Logged each time the method is run without returning early.
  </summary>
</histogram>

<histogram name="Accessibility.Performance.Tree.Unserialize" units="ms"
    expires_after="2022-12-18">
  <owner>aleventhal@chromium.org</owner>
  <owner>janewman@microsoft.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks time spent on the browser process unserializing accessibility
    updates. Logged each time the method is run without returning early.
  </summary>
</histogram>

<histogram name="Accessibility.Performance.WinAPIs.{API}" units="microseconds"
    expires_after="2023-04-24">
  <owner>aleventhal@chromium.org</owner>
  <owner>kschmi@microsoft.com</owner>
  <owner>janewman@microsoft.com</owner>
  <owner>dlibby@microsoft.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks time taken to execute the public Windows API that {API}. This is
    recorded for all Windows users that call into our public APIs.

    Warning: This metric may include reports from clients with low-resolution
    clocks (i.e. on Windows, ref. |TimeTicks::IsHighResolution()|). Such reports
    will cause this metric to have an abnormal distribution. When considering
    revising this histogram, see UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES for the
    solution.
  </summary>
  <token key="API">
    <variant name="UMA_API_ELEMENT_PROVIDER_FROM_POINT"
        summary="finds a node given a point."/>
    <variant name="UMA_API_GET_BOUNDINGRECTANGLE"
        summary="gets the bounding rectangle of a node."/>
    <variant name="UMA_API_GET_PATTERN_PROVIDER"
        summary="retrieves an object that provides support for the given
                 control pattern."/>
    <variant name="UMA_API_GET_PROPERTY_VALUE"
        summary="gets the value of the specified property."/>
    <variant name="UMA_API_NAVIGATE"
        summary="navigates by one node in the given direction."/>
    <variant name="UMA_API_TEXT_RANGEFROMPOINT"
        summary="gets the text range under the given point."/>
    <variant name="UMA_API_TEXTRANGE_COMPARE"
        summary="compares two text ranges"/>
    <variant name="UMA_API_TEXTRANGE_COMPAREENDPOINTS"
        summary="compares two endpoints"/>
    <variant name="UMA_API_TEXTRANGE_EXPANDTOENCLOSINGUNIT"
        summary="expands or contracts the text range to given unit."/>
    <variant name="UMA_API_TEXTRANGE_FINDATTRIBUTE"
        summary="searches for an attribute within text range."/>
    <variant name="UMA_API_TEXTRANGE_FINDTEXT"
        summary="searches for given text within the text range."/>
    <variant name="UMA_API_TEXTRANGE_GETATTRIBUTEVALUE"
        summary="gets the value of the given attribute."/>
    <variant name="UMA_API_TEXTRANGE_GETBOUNDINGRECTANGLES"
        summary="gets the bounding rectanges of a text range."/>
    <variant name="UMA_API_TEXTRANGE_GETCHILDREN"
        summary="gets all children within a text range."/>
    <variant name="UMA_API_TEXTRANGE_GETENCLOSINGELEMENT"
        summary="gets the element that encloses the text range."/>
    <variant name="UMA_API_TEXTRANGE_GETTEXT"
        summary="gets the text within a text range."/>
    <variant name="UMA_API_TEXTRANGE_MOVE"
        summary="moves the text range by the given amount."/>
    <variant name="UMA_API_TEXTRANGE_MOVEENDPOINTBYUNIT"
        summary="moves endpoint by the given unit."/>
    <variant name="UMA_API_TEXTRANGE_MOVEENPOINTBYRANGE"
        summary="moves endpoint by the given range."/>
  </token>
</histogram>

<histogram name="Accessibility.Reliability.Tree.UnserializeError"
    enum="AccessibilityTreeUnserializeError" expires_after="2022-11-18">
  <owner>aleventhal@chromium.org</owner>
  <owner>janewman@microsoft.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks the type of failure that occured when unserializing the accessibility
    tree. When an error in unserialization occurs, this is emitted and
    unserialization aborts. In the case of a tree with multiple issues, only the
    first error is recorded. Refer to AXTree::Unserialize for details.
  </summary>
</histogram>

<histogram name="Accessibility.Shortcuts.CrosDockedMagnifier"
    enum="BooleanEnabled" expires_after="2021-12-12">
  <owner>amraboelkher@chromium.org</owner>
  <owner>poromov@chromium.org</owner>
  <summary>
    Whether the Chrome OS Docked Magnifier shortcut is enabled. It's being
    emitted when the Docked Magnifier shortcut is triggered.
  </summary>
</histogram>

<histogram name="Accessibility.Shortcuts.CrosHighContrast"
    enum="BooleanEnabled" expires_after="2021-08-09">
  <owner>amraboelkher@chromium.org</owner>
  <owner>poromov@chromium.org</owner>
  <summary>
    Whether the Chrome OS High Contrast mode shortcut is enabled. It's being
    emitted when the High Contrast shortcut is triggered.
  </summary>
</histogram>

<histogram name="Accessibility.Shortcuts.CrosScreenMagnifier"
    enum="BooleanEnabled" expires_after="2021-08-09">
  <owner>amraboelkher@chromium.org</owner>
  <owner>poromov@chromium.org</owner>
  <summary>
    Whether the Chrome OS Full-screen Magnifier mode shortcut is enabled. It's
    being emitted when the Full-screen Magnifier shortcut is triggered.
  </summary>
</histogram>

<histogram name="Accessibility.Shortcuts.CrosSpokenFeedback"
    enum="BooleanEnabled" expires_after="2021-08-09">
  <owner>amraboelkher@chromium.org</owner>
  <owner>poromov@chromium.org</owner>
  <summary>
    Whether the Chrome OS Spoken Feedback shortcut is enabled. It's being
    emitted when the Spoken Feedback shortcut is triggered.
  </summary>
</histogram>

<histogram name="Accessibility.VTTContainsStyleBlock" enum="BooleanEnabled"
    expires_after="2022-10-18">
  <owner>evliu@google.com</owner>
  <owner>media-dev@chromium.org</owner>
  <summary>
    Whether a VTT file contains an embedded style block. Recorded when a VTT
    file is parsed.
  </summary>
</histogram>

<histogram name="Accessibility.WebSpeech.Duration" units="ms"
    expires_after="2022-12-11">
  <owner>evliu@google.com</owner>
  <owner>chrome-media-ux@google.com</owner>
  <summary>
    Measures the duration of a call to the WebSpeech API. Recorded once per call
    to the Open Speech API that powers the WebSpeech API.
  </summary>
</histogram>

<histogram name="Accessibility.WinAPIs" enum="AccessibilityWinAPIEnum"
    expires_after="2022-12-04">
  <owner>aleventhal@chromium.org</owner>
  <owner>nektar@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>Tracks usage of all public Windows accessibility APIs.</summary>
</histogram>

<histogram name="Accessibility.WinAPIs.GetPropertyValue"
    enum="AccessibilityWinAPIGetPropertyValueEnum" expires_after="2022-09-19">
  <owner>aleventhal@chromium.org</owner>
  <owner>nektar@chromium.org</owner>
  <owner>dlibby@microsoft.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Tracks properties requested via UI Automation GetPropertyValue().
  </summary>
</histogram>

<histogram name="Accessibility.WinHighContrastTheme"
    enum="AccessibilityHighContrastColorScheme" expires_after="2022-12-25">
  <owner>aleventhal@chromium.org</owner>
  <owner>almaher@microsoft.com</owner>
  <owner>weblayoutdev@microsoft.com</owner>
  <summary>
    Tracks which Windows high contrast theme is set in system settings (logged
    once 45 secs after startup). AccessibilityHighContrastColorScheme::None
    indicates that high contrast mode is not enabled.
  </summary>
</histogram>

<histogram name="Accessibility.WinJAWS{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>kenjibaheux@google.com</owner>
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the third-party JAWS screen reader is running (logged once 45 secs
    after startup). Note: prefer Accessibility.WinJAWS.EveryReport when querying
    for unique users, as it is logged more frequently.
    {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.WinNVDA{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>kenjibaheux@google.com</owner>
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the third-party NVDA screen reader is running (logged once 45 secs
    after startup). Note: prefer Accessibility.WinNVDA.EveryReport when querying
    for unique users, as it is logged more frequently.
    {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.WinScreenReader2{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="2020-09-13">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>aleventhal@chromium.org</owner>
  <summary>
    Whether the accessibility mode flag shows that a screen reader is running
    (logged once 45 secs after startup). In this case, Chrome has detected
    accessibility calls that would normally only occur from a screen reader. See
    also the more specific metrics such as Accessibility.WinJAWS/WinNVDA. Note:
    prefer Accessibility.WinScreenReader2.EveryReport when querying for unique
    users, as it is logged more frequently. {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.WinStickyKeys" enum="BooleanEnabled"
    expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>kenjibaheux@google.com</owner>
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether Windows system settings show that Sticky Keys are enabled.
  </summary>
</histogram>

<histogram name="Accessibility.WinSupernova{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>kenjibaheux@google.com</owner>
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the third-party Supernova screen reader is running (logged once 45
    secs after startup). Note: prefer Accessibility.Supernova.EveryReport when
    querying for unique users, as it is logged more frequently.
    {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="Accessibility.WinZoomText{AccessibilityEveryReport}"
    enum="BooleanEnabled" expires_after="never">
<!-- expires-never: usage drives a11y prioritization in browser and content. -->

  <owner>kenjibaheux@google.com</owner>
  <owner>aleventhal@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Whether the third-party ZoomText screen magnifier is running. Note: prefer
    Accessibility.WinZoomText.EveryReport when querying for unique users, as it
    is logged more frequently. {AccessibilityEveryReport}
  </summary>
  <token key="AccessibilityEveryReport" variants="AccessibilityEveryReport">
    <variant name=""/>
  </token>
</histogram>

<histogram name="DomDistiller.DistillabilityRejection" enum="DistillRejection"
    expires_after="M85">
  <owner>wychen@chromium.org</owner>
  <summary>
    The reason to reject distillability at PageDistillableAfterParsing time.
  </summary>
</histogram>

<histogram name="DomDistiller.DistillabilityScoreNMF.Negative" units="score"
    expires_after="M77">
  <owner>wychen@chromium.org</owner>
  <summary>
    Score of distillability from AdaBoost model, non-mobile-friendly only. The
    score shown here is multiplied by 100.
  </summary>
</histogram>

<histogram name="DomDistiller.DistillabilityScoreNMF.Positive" units="score"
    expires_after="M77">
  <owner>wychen@chromium.org</owner>
  <summary>
    Score of distillability from AdaBoost model, non-mobile-friendly only. The
    score shown here is multiplied by 100.
  </summary>
</histogram>

<histogram name="DomDistiller.InfoBarUsage" enum="BooleanUsage"
    expires_after="2022-12-18">
  <owner>mdjones@chromium.org</owner>
  <summary>
    &quot;Used&quot; is recorded when the user clicks the infobar to enter
    Reader Mode. &quot;Not Used&quot; is recorded when the user clicks the close
    button. If there's no user action, nothing is recorded.
  </summary>
</histogram>

<histogram name="DomDistiller.LongArticleScoreNMF.Negative" units="score"
    expires_after="M85">
  <owner>wychen@chromium.org</owner>
  <summary>
    Score of long article from AdaBoost model, distillable and
    non-mobile-friendly only. The score shown here is multiplied by 100.
  </summary>
</histogram>

<histogram name="DomDistiller.LongArticleScoreNMF.Positive" units="score"
    expires_after="M85">
  <owner>wychen@chromium.org</owner>
  <summary>
    Score of long article from AdaBoost model, distillable and
    non-mobile-friendly only. The score shown here is multiplied by 100.
  </summary>
</histogram>

<histogram name="DomDistiller.MessageDismissalCondition"
    enum="ReaderModeMessageDismissalCondition" expires_after="2022-12-31">
  <owner>twellington@chromium.org</owner>
  <owner>aishwaryarj@google.com</owner>
  <summary>
    Records whether the user accepted or ignored/dismissed the Reader Mode
    message prompt in conjunction with the Reader Mode accessibility setting.
    Recorded for Android only.
  </summary>
</histogram>

<histogram name="DomDistiller.PageDistillableAfterLoading"
    enum="DistillableType2" expires_after="M85">
  <owner>wychen@chromium.org</owner>
  <summary>
    Records the &quot;Distillable Type&quot; (mobile-friendly not distillable,
    mobile-friendly distillable, non-mobile-friendly not distillable,
    non-mobile-friendly distillable) for each analyzed page after loading.
  </summary>
</histogram>

<histogram name="DomDistiller.PageDistillableAfterParsing"
    enum="DistillableType2" expires_after="M85">
  <owner>wychen@chromium.org</owner>
  <summary>
    Records the &quot;Distillable Type&quot; (mobile-friendly not distillable,
    mobile-friendly distillable, non-mobile-friendly not distillable,
    non-mobile-friendly distillable) for each analyzed page after parsing.
  </summary>
</histogram>

<histogram name="DomDistiller.PageHasDistilledData"
    enum="BooleanHasDistilledData" expires_after="M85">
  <owner>kuan@chromium.org</owner>
  <summary>Records whether a page has distilled data.</summary>
</histogram>

<histogram name="DomDistiller.ReaderMode.EntryPoint"
    enum="ReaderModeEntryPoint" expires_after="2022-11-27">
  <owner>katie@chromium.org</owner>
  <owner>gilmanmh@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>The method a user used to enter reader mode on an article.</summary>
</histogram>

<histogram name="DomDistiller.ReaderMode.ExitPoint" enum="ReaderModeEntryPoint"
    expires_after="2021-10-10">
  <owner>katie@chromium.org</owner>
  <owner>gilmanmh@google.com</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The method a user used to exit reader mode and return to the original
    article.
  </summary>
</histogram>

<histogram name="DomDistiller.ReaderModeAccessibilitySettingSelected"
    enum="Boolean" expires_after="2022-12-31">
  <owner>twellington@chromium.org</owner>
  <owner>aishwaryarj@google.com</owner>
  <summary>
    Records when the Reader Mode accessibility setting is selected or
    deselected. Recorded for Android only.
  </summary>
</histogram>

<histogram name="DomDistiller.ReaderShownForPageLoad" enum="Boolean"
    expires_after="2023-01-01">
  <owner>mdjones@chromium.org</owner>
  <summary>
    Records if the panel became visible at any point after a page was navigated.
  </summary>
</histogram>

<histogram name="DomDistiller.Statistics.FirstPageWordCount" units="words"
    expires_after="M85">
  <owner>mdjones@chromium.org</owner>
  <summary>
    Records the number of words in a distilled page. This only records the first
    page of a multi-page article.
  </summary>
</histogram>

<histogram name="DomDistiller.Statistics.WordCount" units="words"
    expires_after="M85">
  <owner>nyquist@chromium.org</owner>
  <summary>
    Records the number of words in a distilled page. For articles with multiple
    pages, each page is counted separately.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.ActivelyViewingArticleBeforeDistilling"
    units="ms" expires_after="2021-08-19">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@chromium.org</owner>
  <summary>
    Records the amount of active time a user spent on a distillable page before
    switching that page to Reader Mode. Active time is time that the article was
    visible, not total time the page was open: the timer is paused when the page
    is not visible. This is not recorded when the user opens a distillable page
    but does not switch to Reader Mode from that page (via the omnibox icon or
    menu option).
  </summary>
</histogram>

<histogram name="DomDistiller.Time.ActivelyViewingReaderModePage" units="ms"
    expires_after="2021-08-19">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@chromium.org</owner>
  <summary>
    Records the amount of active time a user spent on a Reader Mode page. Active
    time is the time the Reader Mode page was visible, not the total time the
    page was open: the timer is paused when the page is not visible. This is
    recorded regardless of how a user enters the page: e.g. using the
    forward/back buttons, entering the URL directly, or coming from a
    distillable page all start the timer equally.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.ArticleProcessing" units="ms"
    expires_after="M77">
  <owner>yfriedman@chromium.org</owner>
  <summary>
    Time spent in DomDistiller's identification of text content.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.DistillationTotal" units="ms"
    expires_after="M85">
  <owner>yfriedman@chromium.org</owner>
  <summary>Complete time spent in DomDistiller's processing of a page.</summary>
</histogram>

<histogram name="DomDistiller.Time.DistillPage" units="ms" expires_after="M77">
  <owner>wychen@chromium.org</owner>
  <summary>
    Time spent in DistillPageImpl(), mostly ExecuteJavaScript(), including
    compilation and execution.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.DocumentConstruction" units="ms"
    expires_after="M77">
  <owner>yfriedman@chromium.org</owner>
  <summary>
    Time spent in creating DomDistiller's internal representation of the HTML
    document.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.Formatting" units="ms" expires_after="M77">
  <owner>yfriedman@chromium.org</owner>
  <summary>
    Time spent in DomDistiller's final processing of article content/formatting.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.MarkupParsing" units="ms"
    expires_after="M77">
  <owner>yfriedman@chromium.org</owner>
  <summary>
    Time spent in DomDistiller's processing of article metadata.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.RunJavaScript" units="ms"
    expires_after="M77">
  <owner>wychen@chromium.org</owner>
  <summary>
    Time spent in ExecuteJavaScript() in DomDistiller. It includes JavaScript
    code transmission through IPC, parsing, compilation, execution, and
    returning the JSON back through IPC.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.ViewerLoading" units="ms"
    expires_after="M77">
  <owner>wychen@chromium.org</owner>
  <summary>
    Records the time from the Reader Mode panel opening to the viewer loaded.
  </summary>
</histogram>

<histogram name="DomDistiller.Time.ViewingReaderModePage" units="ms"
    expires_after="2022-12-25">
  <owner>mdjones@chromium.org</owner>
  <summary>
    Records the amount of time a user spent on a Reader Mode Page.
  </summary>
</histogram>

<histogram name="PumpkinInstaller.InstallationSuccess" enum="BooleanSuccess"
    expires_after="2023-01-01">
  <owner>akihiroota@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Pumpkin installation is triggered when one of the features using Pumpkin
    (currently the only feature using Pumpkin is Dictation) are enabled. This
    histogram is recorded once when Pumpkin installation finishes with either
    success or failure.
  </summary>
</histogram>

<histogram name="SodaInstaller.BinaryInstallationFailureTime" units="ms"
    expires_after="2023-01-01">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>yilkal@chromium.org</owner>
  <summary>
    Soda Installation is triggered when one of the features using SODA (e.g.
    Live Caption, Projector, Offline Dictation) are enabled. Records the time
    taken to get to SODA binary installation error. This is recorded once when
    SODA installation attempt fails.
  </summary>
</histogram>

<histogram name="SodaInstaller.BinaryInstallationResult" enum="BooleanSuccess"
    expires_after="2023-01-01">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>yilkal@chromium.org</owner>
  <summary>
    Soda Installation is triggered when one of the features using SODA (e.g.
    Live Caption, Projector, Offline Dictation) are enabled. Records whether
    SODA binary installation succeeded. This is recorded once when SODA
    installation attempt finishes with either success or failure.
  </summary>
</histogram>

<histogram name="SodaInstaller.BinaryInstallationSuccessTime" units="ms"
    expires_after="2023-01-01">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>yilkal@chromium.org</owner>
  <summary>
    Soda Installation is triggered when one of the features using SODA (e.g.
    Live Caption, Projector, Offline Dictation) are enabled. Records the time
    taken to successfully install SODA binary. This is recorded once when SODA
    installation attempt succeedes.
  </summary>
</histogram>

<histogram
    name="SodaInstaller.Language.{SodaLanguageCode}.InstallationFailureTime"
    units="ms" expires_after="2023-01-01">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>yilkal@chromium.org</owner>
  <summary>
    Soda Installation is triggered when one of the features using SODA (e.g.
    Live Caption, Projector, Offline Dictation) are enabled. Records the time
    taken to get to SODA language pack installation error. This is recorded once
    when SODA language pack installation attempt fails.
  </summary>
  <token key="SodaLanguageCode" variants="SodaLanguageCode"/>
</histogram>

<histogram name="SodaInstaller.Language.{SodaLanguageCode}.InstallationResult"
    enum="BooleanSuccess" expires_after="2023-01-01">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>yilkal@chromium.org</owner>
  <summary>
    Soda Installation is triggered when one of the features using SODA (e.g.
    Live Caption, Projector, Offline Dictation) are enabled. Records whether
    SODA language pack installation succeeded or not. This is recorded once when
    SODA language pack installation attempt finishes with either success or
    failure.
  </summary>
  <token key="SodaLanguageCode" variants="SodaLanguageCode"/>
</histogram>

<histogram
    name="SodaInstaller.Language.{SodaLanguageCode}.InstallationSuccessTime"
    units="ms" expires_after="2023-01-01">
  <owner>abigailbklein@google.com</owner>
  <owner>evliu@google.com</owner>
  <owner>yilkal@chromium.org</owner>
  <summary>
    Soda Installation is triggered when one of the features using SODA (e.g.
    Live Caption, Projector, Offline Dictation) are enabled. Records the time
    taken to successfully install SODA language pack. This is recorded once when
    SODA language pack installation succeedes.
  </summary>
  <token key="SodaLanguageCode" variants="SodaLanguageCode"/>
</histogram>

<histogram name="TextToSpeech.Event" enum="TextToSpeechEvent"
    expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Events fired by the text-to-speech engine when speaking an utterance.
  </summary>
</histogram>

<histogram name="TextToSpeech.Utterance.FromExtensionAPI"
    enum="TextToSpeechFromExtensionAPI" expires_after="2023-07-01">
  <owner>dtseng@chromium.org</owner>
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    Indicates if an utterance spoken via synthesized text-to-speech was
    triggered by the Chrome TTS extension API or the web speech API.
  </summary>
</histogram>

<histogram name="TextToSpeech.Utterance.HasVoiceName"
    enum="TextToSpeechHasVoiceName" expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    True if an utterance spoken via synthesized text-to-speech requested a
    specific voice by name.
  </summary>
</histogram>

<histogram name="TextToSpeech.Utterance.Native" enum="TextToSpeechNative"
    expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    True if an utterance is spoken with native speech provided by the operating
    system, otherwise it's spoken via a Chrome extension that implements
    text-to-speech support.
  </summary>
</histogram>

<histogram name="TextToSpeech.Utterance.Source" enum="TextToSpeechSource"
    expires_after="2023-07-01">
  <owner>joelriley@google.com</owner>
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    ChromeOS source that triggered text-to-speech utterance via extension API,
    from a few known accessibility clients (Select-to-speak, ChromeVox).
  </summary>
</histogram>

<histogram name="TextToSpeech.Utterance.TextLength" units="bytes"
    expires_after="2023-07-01">
  <owner>katie@chromium.org</owner>
  <owner>chrome-a11y-core@google.com</owner>
  <summary>
    The length of an utterance to be spoken via synthesized text-to-speech.
  </summary>
</histogram>

</histograms>

</histogram-configuration>