/
histograms.xml
15408 lines (13815 loc) · 562 KB
/
histograms.xml
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<!--
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 others 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="AvailabilityProberClient">
<variant name="IsolatedPrerenderCanaryCheck"
summary="(M85 only) Canary check for Isolated Prerenders probing">
<obsolete>
Removed in M98.
</obsolete>
</variant>
<variant name="IsolatedPrerenderDNSCanaryCheck"
summary="DNS canary check for Isolated Prerenders probing">
<obsolete>
Removed in M98.
</obsolete>
</variant>
<variant name="IsolatedPrerenderOriginCheck"
summary="Origin check for Isolated Prerenders">
<obsolete>
Removed in M98.
</obsolete>
</variant>
<variant name="IsolatedPrerenderTLSCanaryCheck"
summary="TLS canary check for Isolated Prerenders probing">
<obsolete>
Removed in M98.
</obsolete>
</variant>
<variant name="Litepages" summary="Lite page HTTPS Server Previews">
<obsolete>
Removed in M84.
</obsolete>
</variant>
<variant name="LitepagesOriginCheck"
summary="Origin check for Litepage previews">
<obsolete>
Removed in M84.
</obsolete>
</variant>
</variants>
<variants name="DIPSCookieMode">
<variant name=".Block3PC"
summary="in a NON-off-the-record profile, with third-party cookies
blocked"/>
<variant name=".OffTheRecord"
summary="in an off-the-record profile, with third-party cookies enabled"/>
<variant name=".OffTheRecord_Block3PC"
summary="in an off-the-record profile, with third-party cookies blocked"/>
<variant name=".Standard"
summary="in a NON-off-the-record profile, with third-party cookies
enabled"/>
</variants>
<variants name="DIPSRedirectType">
<variant name="Client" summary="client-side"/>
<variant name="Server" summary="server-side"/>
</variants>
<variants name="GridTabSwitcherMessageTypes">
<variant name="PriceAlertsMessageCard"
summary="the promo message for price notifications"/>
<variant name="PriceWelcomeMessageCard"
summary="the message introducing price chips"/>
</variants>
<variants name="ImportantFileClients">
<variant name="" summary="Unknown file"/>
<variant name=".BookmarkStorage" summary="Bookmarks file"/>
<variant name=".FeedbackReport" summary="Feedback Report file"/>
<variant name=".Local_State" summary="Local State file"/>
<variant name=".Preferences" summary="Preferences file"/>
<variant name=".Secure_Preferences" summary="Secure Preferences file"/>
<variant name=".StructuredMetricsPersistentProto"
summary="Structured metrics persistent proto"/>
</variants>
<variants name="InterestGroupRequestType">
<variant name="BiddingScriptJS" summary="buyer JavaScript bidding script"/>
<variant name="BiddingScriptWasm" summary="buyer WebAssembly bidding script"/>
<variant name="DebugLossReport"
summary="post-auction forDebuggingOnly.reportAdAuctionLoss() report"/>
<variant name="DebugWinReport"
summary="post-auction forDebuggingOnly.reportAdAuctionWin() report"/>
<variant name="ScoringScriptJS" summary="seller JavaScript scoring script"/>
<variant name="SendReportToReport"
summary="post-auction sendReportTo() report (from either the winning
bidder or the seller)"/>
<variant name="TrustedBidding" summary="trusted bidding signals"/>
<variant name="TrustedScoring" summary="trusted scoring signals"/>
<variant name="Update" summary="interest group update"/>
</variants>
<variants name="ProcessName">
<variant name="BrowserProcess" summary=""/>
<variant name="GPUProcess" summary=""/>
<variant name="NetworkProcess" summary=""/>
<variant name="PluginProcess" summary=""/>
<variant name="PPAPIFlashProcess" summary="">
<obsolete>
Ported over from previous suffix based definition where it was removed on
2021-03 now that support for Flash has been removed.
</obsolete>
</variant>
<variant name="PPAPIProcess" summary=""/>
<variant name="RendererExtensionEventProcess" summary=""/>
<variant name="RendererExtensionPersistentProcess" summary=""/>
<variant name="RendererProcess" summary=""/>
<!-- "Total" variant used to exist but was folded into the histogram names and could not be made obsolete. -->
<variant name="UtilityProcess" summary=""/>
<variant name="WorkerProcess" summary=""/>
</variants>
<variants name="UrlParamFilterClassificationRole">
<variant name=".Destination"
summary="parameters classified as having the destination role"/>
<variant name=".Invalid"
summary="parameters with an unknown role, likely indicating a
compatibility issue"/>
<variant name=".Source"
summary="parameters classified as having the source role"/>
</variants>
<variants name="VoiceIntentTargetVariant">
<variant name="Assistant" summary="Assistant voice transcription."/>
<variant name="System" summary="System voice transcription."/>
</variants>
<variants name="WebContentsObserverMethods">
<variant name="DidChangeVisibleSecurityState"/>
<variant name="DidFinishLoad"/>
<variant name="DidFinishNavigation"/>
<variant name="DidFirstVisuallyNonEmptyPaint"/>
<variant name="DidRedirectNavigation"/>
<variant name="DidStartLoading"/>
<variant name="DidStartNavigation"/>
<variant name="DidStopLoading"/>
<variant name="DocumentAvailableInMainFrame"/>
<variant name="DOMContentLoaded"/>
<variant name="LoadProgressChanged"/>
<variant name="NavigationEntryChanged"/>
<variant name="NavigationEntryCommitted"/>
<variant name="NavigationEntryDeleted"/>
<variant name="OnVisibilityChanged"/>
<variant name="PrimaryMainDocumentElementAvailable"/>
<variant name="RenderFrameCreated"/>
<variant name="RenderFrameDeleted"/>
<variant name="RenderViewReady"/>
<variant name="TitleWasSet"/>
</variants>
<histogram name="AccessCodeCast.Discovery.AddSinkResult.New"
enum="AccessCodeCastAddSinkResult" expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The result of adding a cast sink to the media router sink list via the
AccessCodeCastSinkService when discovering it using an access code. Recorded
after the cast sink is added. Logged only on desktop platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Discovery.AddSinkResult.Remembered"
enum="AccessCodeCastAddSinkResult" expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The result of adding a cast sink to the media router sink list via the
AccessCodeCastSinkService when the device was remembered due to device
policy. Recorded after the cast sink is added. Logged only on desktop
platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Discovery.CastModeOnSuccess"
enum="AccessCodeCastCastMode" expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The selected cast mode when a cast session is successfully started
(ResultCode::OK) after a user enters an access code. Logged only on desktop
platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Discovery.RememberedDevicesCount"
units="cast devices" expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The count of cast devices which have been successfully remembered via the
access code cast sink service. Recorded when the browser starts, and any
time the network changes. Logged only on desktop platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Ui.AccessCodeInputTime" units="ms"
expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The amount of time in milliseconds for the user to input an access code
after the UI is enabled for a cast attempt. Recorded when the user presses
enter or the submit button after typing an access code. Logged only on
desktop platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Ui.CastAttemptLength" units="ms"
expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The amount of time in milliseconds that the dialog is loading while
attempting to cast to a new device via access code. Recorded after a cast
attempt completes, and does not depend on whether the attempt was successful
or ended in error. Logged only on desktop platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Ui.DialogCloseReason"
enum="AccessCodeCastDialogCloseReason" expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The reason why the Access Code Cast dialog closed. Recorded when the Access
Code Cast dialog closes. Logged only on desktop platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Ui.DialogLoadTime" units="ms"
expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The length of time for the AccessCodeCast dialog to finish loading after
instantiation. Recorded after the UI creates a page handler object. Logged
only on desktop platforms.
</summary>
</histogram>
<histogram name="AccessCodeCast.Ui.DialogOpenLocation"
enum="AccessCodeCastDialogOpenLocation" expires_after="2023-01-01">
<owner>bzielinski@google.com</owner>
<owner>cros-edu-eng@google.com</owner>
<summary>
The location from which the AccessCodeCast dialog is opened. Recorded after
the dialog opens. Only logged on desktop platforms.
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.AnalyzerCreationError"
enum="ActivityTrackerAnalyzerCreationError" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
The analyzer creation error code. Logged each time analyzer creation fails,
at most once per processed stability debug file.
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.InitStatus"
enum="ActivityTrackerCollectInitStatus" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Status of the initialization to collect stability debug files. Logged once,
during the initialization of the stability debug file collection.
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.StabilityFileCount" units="count"
expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Number of files found during stability file collection. Logged each time the
stability file collection proceeds (at most once per launch).
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.Status"
enum="ActivityTrackerCollectStatus" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Status for the collection of a stability debug file. Logged each time a
debug file collection attempt is made.
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.SystemSessionAnalysisStatus"
enum="ActivityTrackerSystemSessionAnalysisStatus" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Status for the analysis of the system session state. Logged each time a
debug file is collected.
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.TotalTime" units="ms"
expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Time spent collecting stability debug information. Logged each time a
collection is performed.
</summary>
</histogram>
<histogram name="ActivityTracker.Collect.WriteDumpStatus"
enum="ActivityTrackerWriteDumpStatus" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Status of the minidump writing. Logged each time a writing a minidump is
attempted.
</summary>
</histogram>
<histogram name="ActivityTracker.CollectCrash.Event"
enum="ActivityTrackerCollectOnCrashEvent" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Events that occur during crash collection of the debug file. Logged each
time an event of interest occurs during crash debug file collection.
</summary>
</histogram>
<histogram name="ActivityTracker.CollectCrash.Status"
enum="ActivityTrackerCollectStatus" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Status for the collection of a stability debug file. Logged each time a
debug file collection attempt is made from the crash handler.
</summary>
</histogram>
<histogram name="ActivityTracker.Record.Event"
enum="ActivityTrackerRecordEvent" expires_after="M90">
<owner>siggi@chromium.org</owner>
<summary>
Events pertaining to recording to the debug file. Logged each time an event
of interest occurs wrt debug file recording.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.AbortTime" units="ms"
expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The length of time it took to run a FLEDGE auction that was aborted. This
only happens on frame destruction. Recorded when the frame is destroyed.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.AuctionWithWinnerTime" units="ms"
expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The length of time it took to run a FLEDGE auction that had a winning bid.
Recorded on auction complete.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.CompletedWithoutWinnerTime"
units="ms" expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The length of time it took to run a FLEDGE auction that completed
successfully without a winner either due to no bidders making a bid, or the
seller script rejecting all bidders. Not recoded when there are no bidders,
or when an auction fails due to the seller worklet failing to load. Recorded
on auction complete.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.First6AuctionsBitsPerPage"
units="bitfield" expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The outcome of the first 6 auctions reported as bits, tracked per-page,
reported at page unload (if at least 1 auction completed). A 1 indicates
auction success, 0 indicates auction failure. The most significant bit
corresponds to the least recent auction. An extra leading 1 is prepended --
this allows reporting metrics when fewer than 6 auctions occurred during the
page's lifetime. Therefore, the max value is 0b1111111 (7 bits, represents 6
successful auctions), and the min value is 0b10 (represents a page that had
1 failed auction), and every value in between is valid. Not updated for
auctions skipped due to enforcing the auction limit, see
NumAuctionsSkippedDueToAuctionLimit. Also, not updated if runAdAuction()
fails before the auction worklets run.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.GroupFreshness.{Type}"
units="minutes" expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
For every interest group that participates in an auction, the time duration
since the last join or update of that interest group.
This metric only measures {Type}.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
<token key="Type">
<variant name="NoDailyUpdates"
summary="interest groups that don't specify a dailyUpdateUrl"/>
<variant name="WithDailyUpdates"
summary="interest groups that specify a dailyUpdateUrl"/>
</token>
</histogram>
<histogram name="Ads.InterestGroup.Auction.NumAuctionsPerPage" units="auctions"
expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The number of auctions (runAdAuction() calls) per-page, from page load to
unload, reported at unload (if at least 1 auction completed). Not updated
for auctions skipped due to enforcing the auction limit, see
NumAuctionsSkippedDueToAuctionLimit. Also, not updated if runAdAuction()
fails before the auction worklets run.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.NumAuctionsSkippedDueToAuctionLimit"
units="auctions" expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The number of auctions (runAdAuction() calls) per-page, from page load to
unload, reported at unload (if at least 1 auction completed) that were
skipped due to hitting the auction limit.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.NumInterestGroups" units="groups"
expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The number of a user's interest groups taking part in a FLEDGE auction. This
is the number of interest groups matching the auction configuration, not the
number whose scripts are successfully loaded or that make bids. Recorded
after all matching interest groups have been retrieved from storage at the
start of an auction.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.NumOwnersWithInterestGroups"
units="owners" expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The number of owner origins with interest groups taking part in a FLEDGE
auction. This is not the number of owners listed by the auction's
configuration, but rather only the subset of them that have interest groups
the user currently belongs to. Recorded after all interest groups
participating in an auction have been retrieved from storage at the start of
an auction.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.NumSellersWithBidders"
units="sellers" expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The number of sellers participating in a FLEDGE auction with a non-zero
number of bidders, including both the top-level seller and sellers in
component auctions. A bidder is defined as an interest group owned by one of
the owners participating in an auction, or, for the top-level auction, a
component auction with such interest groups. Double-counts sellers that
participate in multiple component auctions. Only recorded if an auction has
at least one interest group participating (could be in the top-level
auction, or in any component auction).
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.PercentAuctionsSuccessfulPerPage"
units="%" expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The percentage of auctions (runAdAuction() calls) per-page that succeed,
from page load to unload, reported at unload (if at least 1 auction
completed), rounded down to the nearest percent. Not updated for auctions
skipped due to enforcing the auction limit, see
NumAuctionsSkippedDueToAuctionLimit. Also, not updated if runAdAuction()
fails before the auction worklets run.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.Result" enum="AuctionResult"
expires_after="2023-07-31">
<owner>mmenke@chromium.org</owner>
<owner>morlovich@chromium.org</owner>
<summary>
The final result type of running a FLEDGE auction. Recorded on auction
completion/cancellation.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Auction.TimeSinceLastAuctionPerPage"
units="ms" expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The duration between runAdAuction() calls, collected on a per-page basis,
reported on each auction. Not updated for auctions skipped due to enforcing
the auction limit, see NumAuctionsSkippedDueToAuctionLimit. Also, not
updated if runAdAuction() fails before the auction worklets run.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
</histogram>
<histogram name="Ads.InterestGroup.Net.RequestUrlSizeBytes.{Type}"
units="bytes" expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The number of bytes sent for {Type} requests, reported upon each request.
This is just the size of the request URL; it doesn't include the size of the
HTTP headers or the word "GET".
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
<token key="Type" variants="InterestGroupRequestType"/>
</histogram>
<histogram name="Ads.InterestGroup.Net.ResponseSizeBytes.{Type}" units="bytes"
expires_after="2023-07-31">
<owner>caraitto@chromium.org</owner>
<owner>pauljensen@chromium.org</owner>
<owner>privacy-sandbox-dev@chromium.org</owner>
<summary>
The number of bytes received for {Type} requests, reported upon receving a
response.
See https://github.com/WICG/turtledove/blob/main/FLEDGE.md for the latest
version of the FLEDGE explainer.
</summary>
<token key="Type" variants="InterestGroupRequestType"/>
</histogram>
<histogram name="Ads.Media.Duration" units="ms" expires_after="2022-10-30">
<owner>johnidel@chromium.org</owner>
<owner>dalecurtis@chromium.org</owner>
<summary>
Duration in milliseconds of HTML5 media (when known). Only recorded for
media within ad subframes. This is recorded every time the duration changes
for a video, and can be recorded multiple times for a single video (the
overall duration may not be known when loading starts). Because the duration
will generally increase as more video gets buffered, this histogram may skew
low.
</summary>
</histogram>
<histogram name="Ads.Media.LoadType" enum="MediaLoadType"
expires_after="2021-08-09">
<owner>johnidel@chromium.org</owner>
<owner>jkarlin@chromium.org</owner>
<summary>
Load type of HTML5 media in ad subframes such as URL, MediaSource and
MediaStream.
</summary>
</histogram>
<histogram base="true" name="Ads.ResourceUsage.Size.Cache2" units="KB"
expires_after="2020-10-02">
<obsolete>
Removed 11/2020.
</obsolete>
<owner>johnidel@chromium.org</owner>
<owner>jkarlin@chromium.org</owner>
<summary>
For a given resource fetched from the disk cache or blink memory cache, logs
the encoded body length of the resource, even if the resource request was
canceled or incomplete. Recorded when the resource request is complete, or
when the page is destroyed/navigated for incomplete resources. The sum of
samples across a page load may differ substatially from the true sum due to
per-sample rounding. These are not intended to be compared to page level
histograms.
</summary>
</histogram>
<histogram base="true" name="Ads.ResourceUsage.Size.Network" units="KB"
expires_after="2020-10-02">
<obsolete>
Removed 11/2020.
</obsolete>
<owner>johnidel@chromium.org</owner>
<owner>jkarlin@chromium.org</owner>
<summary>
For a given resource fetched from the network, logs the network bytes used
to load the resource (including headers), even if the resource request was
canceled or incomplete. Recorded when the resource request is complete, or
when the page is destroyed/navigated for incomplete resources. The sum of
samples across a page load may differ substatially from the true sum due to
per-sample rounding. These are not intended to be compared to page level
histograms.
</summary>
</histogram>
<histogram name="AnchorElementMetrics.Clicked.OnDSE.SameHost"
enum="BooleanAnchorElementSameHost" expires_after="2021-08-09">
<obsolete>
Removed 04/2020.
</obsolete>
<owner>tbansal@chromium.org</owner>
<summary>
True if the target link of the anchor element has the same host as the root
document. Recorded only on default search engine pages.
</summary>
</histogram>
<histogram name="AnchorElementMetrics.Clicked.OnNonDSE.SameHost"
enum="BooleanAnchorElementSameHost" expires_after="2021-08-22">
<obsolete>
Removed 04/2020.
</obsolete>
<owner>tbansal@chromium.org</owner>
<owner>ryansturm@chromium.org</owner>
<owner>src/chrome/browser/navigation_predictor/OWNERS</owner>
<summary>
True if the target link of the anchor element has the same host as the root
document. Recorded only on pages whose URL do not match the default search
engine.
</summary>
</histogram>
<histogram base="true" name="AnchorElementMetrics.IsSameHost" enum="Boolean"
expires_after="2021-05-21">
<obsolete>
Removed 04/2020.
</obsolete>
<owner>chelu@chromium.org</owner>
<owner>tbansal@chromium.org</owner>
<summary>
True if the target link of the anchor element has the same host as the root
document.
</summary>
</histogram>
<histogram name="AnchorElementMetrics.Visible.NumberOfAnchorElementsAfterMerge"
units="count" expires_after="2021-04-26">
<obsolete>
Removed 04/2020.
</obsolete>
<owner>chelu@chromium.org</owner>
<owner>tbansal@chromium.org</owner>
<summary>
The number of anchor element metrics sent to the browser process on a page
load. Anchor elements having the same href are merged and counted as 1. This
histogram is recorded when the webpage is loaded.
</summary>
</histogram>
<histogram name="AnimatedImage.NumOfFramesSkipped" units="count"
expires_after="2023-04-24">
<owner>khushalsagar@chromium.org</owner>
<owner>graphics-dev@chromium.org</owner>
<summary>
If the frame rate for the image animation can not be reached, frames in the
animation are skipped to catch up to the desired frame. This metric tracks
the number of frames skipped during catch up, and can be used to assess the
smoothness of these animations. It records the number of frames skipped each
time the animation is ticked forward to draw the next frame. In the ideal
case, where the animation can be drawn at the desired rate, 0 frames should
be skipped. Note that skipping of frames can also be triggered if the
animation was intentionally paused (on becoming off-screen, or the tab being
hidden).
Warning: this histogram was expired from 2020-04-24 to 2022-04-29; data may
be missing.
</summary>
</histogram>
<histogram
name="Animation.AnimationWorklet.Dispatcher.AsynchronousMutateDuration"
units="microseconds" expires_after="2021-01-01">
<owner>majidvp@chromium.org</owner>
<owner>animations-dev@chromium.org</owner>
<summary>
The time it takes the WorkletMutatorDispatcher to complete an asynchronous
mutation request of animation worklet. The measured time is the total
elapsed time from when a request is queued until the results are received.
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>
</histogram>
<histogram
name="Animation.AnimationWorklet.Dispatcher.SynchronousMutateDuration"
units="microseconds" expires_after="2021-01-01">
<owner>majidvp@chromium.org</owner>
<owner>animations-dev@chromium.org</owner>
<summary>
The time it takes the WorkletMutatorDispatcher to dispatch to and mutate all
animation worklet mutators synchronously. This includes the time that it
takes each AnimationWorkletGlobalScope to produce its output (which includes
V8 script execution) and also any queuing cost associated with posting
mutation tasks and receiving responses.
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>
</histogram>
<histogram name="Animation.AnimationWorklet.MutateDuration"
units="microseconds" expires_after="2021-01-01">
<owner>majidvp@chromium.org</owner>
<owner>kevers@chromium.org</owner>
<owner>animations-dev@chromium.org</owner>
<summary>
The time it takes for an AnimationWorklet to produce a mutation update. This
includes all V8 script execution cost.
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>
</histogram>
<histogram name="AppleScript.CommandEvent" enum="AppleScriptCommandEvents"
expires_after="M81">
<owner>spqchan@chromium.org</owner>
<summary>The number of times an AppleScript event gets called.</summary>
</histogram>
<histogram name="AsyncDNS.ConfigChange" enum="BooleanSuccess"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Whether DnsConfigService::OnConfigChange actually corresponded to a change
in DnsConfig.
</summary>
</histogram>
<histogram name="AsyncDNS.ConfigNotifyInterval" units="ms" expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Duration of time between calls to DnsConfigService::InvalidateConfig.
</summary>
</histogram>
<histogram name="AsyncDNS.ConfigParseDuration" units="ms" expires_after="M81">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>Duration of time spent parsing DnsConfig.</summary>
</histogram>
<histogram name="AsyncDNS.ConfigParsePosix" enum="AsyncDNSConfigParsePosix"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Counts of results of parsing DnsConfig in DnsConfigServicePosix.
</summary>
</histogram>
<histogram name="AsyncDNS.ConfigParseWin" enum="AsyncDNSConfigParseWin"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Counts of results of parsing DnsConfig in DnsConfigServiceWin.
</summary>
</histogram>
<histogram name="AsyncDNS.HostParseResult" enum="BooleanSuccess"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>Whether DnsHosts were parsed successfully.</summary>
</histogram>
<histogram name="AsyncDNS.HostsChange" enum="BooleanSuccess"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Whether DnsConfigService::OnHostsChange actually corresponded to a change in
DnsHosts.
</summary>
</histogram>
<histogram name="AsyncDNS.HostsNotifyInterval" units="ms" expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Duration of time between calls to DnsConfigService::InvalidateHosts.
</summary>
</histogram>
<histogram name="AsyncDNS.HostsParseDuration" units="ms" expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>Duration of time spent parsing DnsHosts.</summary>
</histogram>
<histogram name="AsyncDNS.HostsParseWin" enum="AsyncDNSHostsParseWin"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Counts of results of parsing DnsHosts in DnsConfigServiceWin.
</summary>
</histogram>
<histogram name="AsyncDNS.ServerCount" units="units" expires_after="2021-03-21">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Count of servers in DnsConfig. Recorded on every new DnsSession, which is
created on DNS change.
</summary>
</histogram>
<histogram name="AsyncDNS.UnchangedConfigInterval" units="ms"
expires_after="M77">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>pauljensen@chromium.org</owner>
<owner>mef@chromium.org</owner>
<summary>
Duration of time since the last empty config result to the time a non-change
OnConfigChange is received.
</summary>
</histogram>
<histogram name="AsyncDNS.UnchangedHostsInterval" units="ms"
expires_after="2021-01-31">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>ericorth@chromium.org</owner>
<owner>src/net/OWNERS</owner>
<summary>
Duration of time since the last empty config result to the time a non-change
OnHostsChange is received.
</summary>
</histogram>
<histogram name="AsyncDNS.WatchStatus" enum="AsyncDNSWatchStatus"
expires_after="2021-01-31">
<obsolete>
Removed 2021-01.
</obsolete>
<owner>ericorth@chromium.org</owner>
<owner>src/net/OWNERS</owner>
<summary>
The result of DnsConfigService watch. Counts STARTED on every initialization
and FAILED_* on any failure.
</summary>
</histogram>
<histogram name="Aura.CreatedGpuBrowserCompositor" enum="CompositorType"
expires_after="2020-04-05">
<owner>jbauman@chromium.org</owner>
<summary>
Whether the browser compositor uses GPU or the software renderer.
</summary>
</histogram>
<histogram name="Autocomplete.Cleanup" units="entries" expires_after="M85">
<owner>seblalancette@chromium.org</owner>
<summary>
Logged when the Autocomplete Retention Policy cleaned up expired entries.
Expired entries are entries that haven't been used in the last 14 months.
</summary>
</histogram>
<histogram name="Autocomplete.DaysSinceLastUse" units="days"
expires_after="M85">
<owner>seblalancette@chromium.org</owner>
<summary>
Logged when users select Autocomplete entries in the dropdown, this
histogram captures the number of days that have passed since the selected
autocomplete entry was last used. I.e., the distribution of time between
uses of an "active" autocomplete entry.
</summary>
</histogram>
<histogram name="Autocomplete.Events" enum="AutocompleteEvents"
expires_after="2022-12-11">
<owner>seblalancette@chromium.org</owner>
<summary>