Tab Search: Add chrome://flags entry for Tab Search

This addition is necessary to allow users to disable the feature once
the experiment is enabled.

Bug: 1099917
Change-Id: I4e537a1fe92d1329c75ff8c190f92ce7f1cde8b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2336020Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794867}

chrome/browser/about_flags.cc

@@ -6182,6 +6182,12 @@ const FeatureEntry kFeatureEntries[] = {
          password_manager::features::kFillingPasswordsFromAnyOrigin)},
 #endif  // OS_ANDROID
 
+#if BUILDFLAG(ENABLE_TAB_SEARCH)
+    {"enable-tab-search", flag_descriptions::kEnableTabSearchName,
+     flag_descriptions::kEnableTabSearchDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(features::kTabSearch)}
+#endif  // BUILDFLAG(ENABLE_TAB_SEARCH)
+
     // NOTE: Adding a new flag requires adding a corresponding entry to enum
     // "LoginCustomFlags" in tools/metrics/histograms/enums.xml. See "Flag
     // Histograms" in tools/metrics/histograms/README.md (run the

chrome/browser/flag_descriptions.cc

@@ -3866,6 +3866,13 @@ const char kEnableSuggestedFilesDescription[] =
     "Enable Suggested Files feature in Launcher, which will show file "
     "suggestions in the suggestion chips when the launcher is opened";
 
+#if BUILDFLAG(ENABLE_TAB_SEARCH)
+const char kEnableTabSearchName[] = "Enable Tab Search";
+const char kEnableTabSearchDescription[] =
+    "Enable the Tab Search feature in Top Chrome UI, which will show a popup"
+    "bubble that allows users to search over their currently open tabs.";
+#endif  // BUILDFLAG(ENABLE_TAB_SEARCH)
+
 const char kEnterpriseReportingInChromeOSName[] =
     "Enterprise cloud reporting in Chrome OS";
 const char kEnterpriseReportingInChromeOSDescription[] =

chrome/browser/flag_descriptions.h

@@ -2242,6 +2242,11 @@ extern const char kEnableZeroStateSuggestionsDescription[];
 extern const char kEnableSuggestedFilesName[];
 extern const char kEnableSuggestedFilesDescription[];
 
+#if BUILDFLAG(ENABLE_TAB_SEARCH)
+extern const char kEnableTabSearchName[];
+extern const char kEnableTabSearchDescription[];
+#endif  // BUILDFLAG(ENABLE_TAB_SEARCH)
+
 extern const char kEnterpriseReportingInChromeOSName[];
 extern const char kEnterpriseReportingInChromeOSDescription[];
 

tools/metrics/histograms/enums.xml

@@ -40579,6 +40579,7 @@ from previous Chrome versions.
   <int value="-1371984027" label="CrostiniWebUIUpgrader:disabled"/>
   <int value="-1371239786" label="EnablePasswordsAccountStorage:enabled"/>
   <int value="-1370532920" label="AppServiceAsh:enabled"/>
+  <int value="-1368913664" label="TabSearch:disabled"/>
   <int value="-1368499577" label="OnTheFlyMhtmlHashComputation:enabled"/>
   <int value="-1365795470"
       label="ServiceWorkerImportedScriptUpdateCheck:disabled"/>
@@ -41827,6 +41828,7 @@ from previous Chrome versions.
   <int value="-40935502" label="ContextualSuggestionsSlimPeekUI:enabled"/>
   <int value="-36503306" label="HomepageLocationPolicy:enabled"/>
   <int value="-36234530" label="PluginVmShowMicrophonePermissions:enabled"/>
+  <int value="-35745997" label="TabSearch:enabled"/>
   <int value="-35388407" label="AshNewSystemMenu:disabled"/>
   <int value="-31444029" label="MediaInspectorLogging:disabled"/>
   <int value="-30966385" label="enable-hardware-overlays"/>