[Camera System Web App] Add a CameraSystemWebApp feature and about flag.

Bug: 980846
Change-Id: I93fbc517d149045f9a5aacbb1ee27d51be673f4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1695301Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: calamity <calamity@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676286}

chrome/browser/about_flags.cc

@@ -2442,6 +2442,9 @@ const FeatureEntry kFeatureEntries[] = {
      ENABLE_DISABLE_VALUE_TYPE(
          chromeos::switches::kShowAndroidFilesInFilesApp,
          chromeos::switches::kHideAndroidFilesInFilesApp)},
+    {"camera-system-web-app", flag_descriptions::kCameraSystemWebAppName,
+     flag_descriptions::kCameraSystemWebAppDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(chromeos::features::kCameraSystemWebApp)},
     {"crostini-gpu-support", flag_descriptions::kCrostiniGpuSupportName,
      flag_descriptions::kCrostiniGpuSupportDescription, kOsCrOS,
      FEATURE_VALUE_TYPE(chromeos::features::kCrostiniGpuSupport)},

chrome/browser/flag-metadata.json

@@ -370,6 +370,11 @@
     "owners": [ "davidbienvenu", "fdoray" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "camera-system-web-app",
+    "owners": [ "calamity", "ortuno" ],
+    "expiry_milestone": 82
+  },
   {
     "name": "cast-media-route-provider",
     "owners": [ "mfoltz", "takumif" ],

chrome/browser/flag_descriptions.cc

@@ -2976,6 +2976,10 @@ const char kBluetoothAggressiveAppearanceFilterDescription[] =
 const char kBulkPrintersName[] = "Bulk Printers Policy";
 const char kBulkPrintersDescription[] = "Enables the new bulk printers policy";
 
+const char kCameraSystemWebAppName[] = "Camera System Web App";
+const char kCameraSystemWebAppDescription[] =
+    "Run the Chrome Camera App as a System Web App.";
+
 const char kCrOSContainerName[] = "Chrome OS Container";
 const char kCrOSContainerDescription[] =
     "Enable the use of Chrome OS Container utility.";

chrome/browser/flag_descriptions.h

@@ -1773,6 +1773,9 @@ extern const char kBluetoothAggressiveAppearanceFilterDescription[];
 extern const char kBulkPrintersName[];
 extern const char kBulkPrintersDescription[];
 
+extern const char kCameraSystemWebAppName[];
+extern const char kCameraSystemWebAppDescription[];
+
 extern const char kCrOSContainerName[];
 extern const char kCrOSContainerDescription[];
 

chromeos/constants/chromeos_features.cc

@@ -23,6 +23,10 @@ const base::Feature kBlueZLongTermKeyBlocklist{
     "BlueZLongTermKeyBlocklist", base::FEATURE_DISABLED_BY_DEFAULT};
 const char kBlueZLongTermKeyBlocklistParamName[] = "ltk_blocklist";
 
+// Enable or disables running the Camera App as a System Web App.
+const base::Feature kCameraSystemWebApp{"CameraSystemWebApp",
+                                        base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Enables or disables Crostini Backup.
 const base::Feature kCrostiniBackup{"CrostiniBackup",
                                     base::FEATURE_ENABLED_BY_DEFAULT};

chromeos/constants/chromeos_features.h

@@ -23,6 +23,8 @@ COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kBlueZLongTermKeyBlocklist;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const char kBlueZLongTermKeyBlocklistParamName[];
+COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
+extern const base::Feature kCameraSystemWebApp;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS) extern const base::Feature kCrostiniBackup;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kCrostiniGpuSupport;

tools/metrics/histograms/enums.xml

@@ -33685,6 +33685,7 @@ Called by update_gpu_driver_bug_workaround_entries.py.-->
   <int value="-1930720286" label="nacl-debug-mask"/>
   <int value="-1928198763" label="enable-async-dns"/>
   <int value="-1925117279" label="disable-quic-https"/>
+  <int value="-1925106340" label="CameraSystemWebApp:disabled"/>
   <int value="-1919199528"
       label="AlwaysShowServerCardsInSyncTransport:disabled"/>
   <int value="-1916060206" label="enable-display-zoom-setting"/>
@@ -34623,6 +34624,7 @@ from previous Chrome versions.
   <int value="-633274640" label="WebRTCPipeWireCapturer:enabled"/>
   <int value="-632030508" label="NativeWindowNavButtons:disabled"/>
   <int value="-631740127" label="inert-visual-viewport"/>
+  <int value="-631614101" label="CameraSystemWebApp:enabled"/>
   <int value="-624221121" label="CommandLineOnNonRooted:enabled"/>
   <int value="-623364791" label="ClickToCallReceiver:disabled"/>
   <int value="-622685174" label="enable-pdf-material-ui"/>