flags: delete expired flag enable-palm-max-touch-major.

Delete this long ago expired flag since it's enabled by default.

Bug: chromium:1207498
Test: browser_tests pass.
Change-Id: Ia2ca5fc1ee218d348423e61c7a5f37f27324429c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4258785
Reviewed-by: Amanda Deacon <amandadeacon@chromium.org>
Auto-Submit: Rob Schonberger <robsc@chromium.org>
Commit-Queue: Rob Schonberger <robsc@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1106054}

chrome/browser/about_flags.cc

@@ -6593,11 +6593,6 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kEnableOsFeedbackDescription, kOsCrOS,
      FEATURE_VALUE_TYPE(ash::features::kOsFeedback)},
 
-    {"enable-palm-max-touch-major",
-     flag_descriptions::kEnablePalmOnMaxTouchMajorName,
-     flag_descriptions::kEnablePalmOnMaxTouchMajorDescription, kOsCrOS,
-     FEATURE_VALUE_TYPE(ui::kEnablePalmOnMaxTouchMajor)},
-
     {"enable-heuristic-stylus-palm-rejection",
      flag_descriptions::kEnableHeuristicStylusPalmRejectionName,
      flag_descriptions::kEnableHeuristicStylusPalmRejectionDescription, kOsCrOS,

chrome/browser/flag-metadata.json

@@ -2835,13 +2835,6 @@
     "owners": [ "dibyapal@chromium.org", "desktop-pwas-team@google.com" ],
     "expiry_milestone": 120
   },
-  {
-    "name": "enable-palm-max-touch-major",
-    "owners": [ "robsc", "napper", "adlr" ],
-    // Added feature to possibly disable/enable this functionality, combined
-    //  with neural net palm detection.
-    "expiry_milestone": 90
-  },
   {
     "name": "enable-palm-suppression",
     "owners": [ "robsc", "napper", "hcutts", "chromeos-tango@google.com" ],

chrome/browser/flag_descriptions.cc

@@ -5276,12 +5276,6 @@ const char kEnableNewShortcutMappingName[] = "Enable New Shortcut Mapping";
 const char kEnableNewShortcutMappingDescription[] =
     "Enables experimental new shortcut mapping";
 
-const char kEnablePalmOnMaxTouchMajorName[] =
-    "Enable Palm when Touch is Maximum";
-const char kEnablePalmOnMaxTouchMajorDescription[] =
-    "Experimental: Enable Palm detection when the touchscreen reports max "
-    "size. Not compatible with all devices.";
-
 const char kEnablePalmSuppressionName[] =
     "Enable Palm Suppression with Stylus.";
 const char kEnablePalmSuppressionDescription[] =

chrome/browser/flag_descriptions.h

@@ -3018,9 +3018,6 @@ extern const char kEnableOsFeedbackDescription[];
 extern const char kEnableNewShortcutMappingName[];
 extern const char kEnableNewShortcutMappingDescription[];
 
-extern const char kEnablePalmOnMaxTouchMajorName[];
-extern const char kEnablePalmOnMaxTouchMajorDescription[];
-
 extern const char kEnablePalmSuppressionName[];
 extern const char kEnablePalmSuppressionDescription[];