[Default Apps] Add Stadia to the default app order.

Add the Stadia app ID and preload it after Duo on the first page.

Bug: 1125414
Change-Id: I156319452ff8d8d855020041dedeac5b14935de6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2397042Reviewed-by: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: dstockwell <dstockwell@google.com>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: Jeevan Shikaram <jshikaram@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809658}

chrome/browser/apps/app_service/app_service_metrics.cc

@@ -56,10 +56,11 @@ enum class DefaultAppName {
   kYouTubeMusic = 38,
   // This is our test SWA. It's only installed in tests.
   kMockSystemApp = 39,
+  kStadia = 40,
 
   // Add any new values above this one, and update kMaxValue to the highest
   // enumerator value.
-  kMaxValue = kMockSystemApp,
+  kMaxValue = kStadia,
 };
 
 void RecordDefaultAppLaunch(DefaultAppName default_app_name,
@@ -249,6 +250,8 @@ void RecordAppLaunch(const std::string& app_id,
 #endif  // OS_CHROMEOS
   else if (app_id == chromeos::default_web_apps::kYoutubeMusicAppId)
     RecordDefaultAppLaunch(DefaultAppName::kYouTubeMusic, launch_source);
+  else if (app_id == chromeos::default_web_apps::kStadiaAppId)
+    RecordDefaultAppLaunch(DefaultAppName::kStadia, launch_source);
 
   // Above are default apps; below are built-in apps.
 

chrome/browser/chromeos/extensions/default_app_order.cc

@@ -68,6 +68,7 @@ const char* const kDefaultAppOrder[] = {
     extension_misc::kGooglePhotosAppId,
     arc::kGooglePhotosAppId,
     arc::kGoogleDuoAppId,
+    default_web_apps::kStadiaAppId,
     app_list::kDefaultPageBreak1,  // First default page break
     // TODO(crbug.com/976578): Remove after M78.
     extension_misc::kGoogleMapsAppId,

chrome/browser/chromeos/web_applications/default_web_app_ids.h

@@ -58,6 +58,10 @@ constexpr char kMediaAppId[] = "jhdjimmaggjajfjphpljagpgkidjilnj";
 // web_app::GenerateAppIdFromURL(GURL("https://music.youtube.com/?source=pwa")).
 constexpr char kYoutubeMusicAppId[] = "cinhimbnkkaeohfgghhklpknlkffjgod";
 
+// Generated as
+// web_app::GenerateAppIdFromURL(GURL("https://stadia.google.com/?lfhs=2")).
+constexpr char kStadiaAppId[] = "pnkcfpnngfokcnnijgkllghjlhkailce";
+
 }  // namespace default_web_apps
 }  // namespace chromeos