[Sharesheet] Add flag for sharesheet.

This CL adds a feature flag for enabling the sharesheet on desktop
platforms.

Bug: 1097623
Change-Id: I5a99db0ed041b3669046a900ad3bedfbbb3f57fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2256941Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Melissa Zhang <melzhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781673}

chrome/browser/about_flags.cc

@@ -5733,6 +5733,12 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kAutofillEnableOffersInDownstreamDescription, kOsAll,
      FEATURE_VALUE_TYPE(autofill::features::kAutofillEnableOffersInDownstream)},
 
+#if defined(OS_CHROMEOS)
+    {"enable-sharesheet", flag_descriptions::kSharesheetName,
+     flag_descriptions::kSharesheetDescription, kOsAll,
+     FEATURE_VALUE_TYPE(features::kSharesheet)},
+#endif  // OS_CHROMEOS
+
     // 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-metadata.json

@@ -2122,6 +2122,11 @@
     "owners": [ "falken", "shimazu", "//content/browser/service_worker/OWNERS" ],
     "expiry_milestone": 87
   },
+  {
+    "name": "enable-sharesheet",
+    "owners": [ "chromeos-apps-foundation-team@google.com" ],
+    "expiry_milestone": 89
+  },
   {
     "name": "enable-sharing-device-registration",
     "owners": [ "//chrome/browser/sharing/OWNERS" ],

chrome/browser/flag_descriptions.cc

@@ -3864,6 +3864,9 @@ const char kSchedulerConfigurationConservative[] =
 const char kSchedulerConfigurationPerformance[] =
     "Enables Hyper-Threading on relevant CPUs.";
 
+const char kSharesheetName[] = "Sharesheet";
+const char kSharesheetDescription[] = "Chrome OS sharesheet.";
+
 const char kShowBluetoothDebugLogToggleName[] =
     "Show Bluetooth debug log toggle";
 const char kShowBluetoothDebugLogToggleDescription[] =

chrome/browser/flag_descriptions.h

@@ -2269,6 +2269,9 @@ extern const char kSchedulerConfigurationDescription[];
 extern const char kSchedulerConfigurationConservative[];
 extern const char kSchedulerConfigurationPerformance[];
 
+extern const char kSharesheetName[];
+extern const char kSharesheetDescription[];
+
 extern const char kShowBluetoothDebugLogToggleName[];
 extern const char kShowBluetoothDebugLogToggleDescription[];
 

chrome/common/chrome_features.cc

@@ -606,6 +606,11 @@ const base::Feature kRemoveSupervisedUsersOnStartup{
 const base::Feature kSecurityKeyAttestationPrompt{
     "SecurityKeyAttestationPrompt", base::FEATURE_ENABLED_BY_DEFAULT};
 
+#if defined(OS_CHROMEOS)
+const base::Feature kSharesheet{"Sharesheet",
+                                base::FEATURE_DISABLED_BY_DEFAULT};
+#endif
+
 #if defined(OS_ANDROID)
 const base::Feature kShowTrustedPublisherURL{"ShowTrustedPublisherURL",
                                              base::FEATURE_ENABLED_BY_DEFAULT};

chrome/common/chrome_features.h

@@ -385,6 +385,11 @@ extern const base::Feature kRemoveSupervisedUsersOnStartup;
 COMPONENT_EXPORT(CHROME_FEATURES)
 extern const base::Feature kSecurityKeyAttestationPrompt;
 
+#if defined(OS_CHROMEOS)
+COMPONENT_EXPORT(CHROME_FEATURES)
+extern const base::Feature kSharesheet;
+#endif
+
 #if defined(OS_ANDROID)
 COMPONENT_EXPORT(CHROME_FEATURES)
 extern const base::Feature kShowTrustedPublisherURL;

tools/metrics/histograms/enums.xml

@@ -40198,6 +40198,7 @@ from previous Chrome versions.
   <int value="-1045882995" label="UseNewDoodleApi:enabled"/>
   <int value="-1044244605"
       label="UpdateNotificationSchedulingIntegration:enabled"/>
+  <int value="-1043883835" label="Sharesheet:enabled"/>
   <int value="-1042723808"
       label="HappinessTrackingSurveysForDesktopSettingsPrivacy:enabled"/>
   <int value="-1042579955" label="ChromeOSParentalControlsSettings:enabled"/>
@@ -40720,6 +40721,7 @@ from previous Chrome versions.
       label="AutofillUpstreamEditableExpirationDate:enabled"/>
   <int value="-468697885" label="ArcInputMethod:enabled"/>
   <int value="-466704882" label="webview-log-js-console-messages"/>
+  <int value="-465381408" label="Sharesheet:disabled"/>
   <int value="-462554210"
       label="OminboxUIExperimentUseGenericSearchEngineIcon:enabled"/>
   <int value="-462404204" label="CryptAuthV2DeviceSync:disabled"/>