Delete ReadAnythingOmniboxIcon experiment and remove all related
code.

Fixed: 329298677
Change-Id: I3ed1d3f3a23917f21d953561b696e4967da3ff34
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5598479
Reviewed-by: Rushan Suleymanov <[email protected]>
Commit-Queue: Abigail Klein <[email protected]>
Reviewed-by: Jacob Francis <[email protected]>
Reviewed-by: Avi Drissman <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1311246}
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index e8487c1..f85be4f 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -1114,6 +1114,12 @@
 inline constexpr char kTrackingProtectionOnboardingNoticeLastRequested[] =
     "tracking_protection.tracking_protection_onboarding_notice_last_requested";
 
+// Deprecated 06/2024.
+#if !BUILDFLAG(IS_ANDROID)
+inline constexpr char kAccessibilityReadAnythingOmniboxIconLabelShownCount[] =
+    "settings.a11y.read_anything.omnibox_icon_label_shown_count";
+#endif
+
 // Register local state used only for migration (clearing or moving to a new
 // key).
 void RegisterLocalStatePrefsForMigration(PrefRegistrySimple* registry) {
@@ -1612,6 +1618,12 @@
                              base::Time());
   registry->RegisterTimePref(kTrackingProtectionOnboardingNoticeLastRequested,
                              base::Time());
+
+// Deprecated 06/2024.
+#if !BUILDFLAG(IS_ANDROID)
+  registry->RegisterIntegerPref(
+      kAccessibilityReadAnythingOmniboxIconLabelShownCount, 0);
+#endif
 }
 
 void ClearSyncRequestedPrefAndMaybeMigrate(PrefService* profile_prefs) {
@@ -2995,6 +3007,12 @@
   profile_prefs->ClearPref(kTrackingProtectionOnboardingNoticeFirstRequested);
   profile_prefs->ClearPref(kTrackingProtectionOnboardingNoticeLastRequested);
 
+  // Added 06/2024.
+#if !BUILDFLAG(IS_ANDROID)
+  profile_prefs->ClearPref(
+      kAccessibilityReadAnythingOmniboxIconLabelShownCount);
+#endif
+
   // Please don't delete the following line. It is used by PRESUBMIT.py.
   // END_MIGRATE_OBSOLETE_PROFILE_PREFS