Revert of arc: Fix default app availability reporting.

chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc

Index: chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
index 3829b002a47cd9aa8fb08049c6e23b1bf442875f..374344a90ce8884a58810d63a92f9e890f2eca3c 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
+++ b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.cc
@@ -563,13 +563,11 @@
       NOTREACHED();
       continue;
     }
-
     // Default apps are reported earlier.
-    if (!tracked_apps_.count(app_id)) {
-      for (auto& observer : observer_list_)
-        observer.OnAppRegistered(app_id, *app_info);
-      tracked_apps_.insert(app_id);
-    }
+    if (default_apps_.HasApp(app_id))
+      continue;
+    for (auto& observer : observer_list_)
+      observer.OnAppRegistered(app_id, *app_info);
   }
 
   apps_restored_ = true;
@@ -724,8 +722,8 @@
   if (app_id == arc::kPlayStoreAppId)
     updated_name = l10n_util::GetStringUTF8(IDS_ARC_PLAYSTORE_ICON_TITLE_BETA);
 
-  const bool was_tracked = tracked_apps_.count(app_id);
-  if (was_tracked) {
+  const bool was_registered = IsRegistered(app_id);
+  if (was_registered) {
     std::unique_ptr<ArcAppListPrefs::AppInfo> app_old_info = GetApp(app_id);
     DCHECK(app_old_info);
     DCHECK(launchable);
@@ -761,7 +759,7 @@
   if (was_disabled && app_ready)
     ready_apps_.insert(app_id);
 
-  if (was_tracked) {
+  if (was_registered) {
     if (was_disabled && app_ready) {
       for (auto& observer : observer_list_)
         observer.OnAppReadyChanged(app_id, true);
@@ -774,7 +772,6 @@
                      launchable, orientation_lock);
     for (auto& observer : observer_list_)
       observer.OnAppRegistered(app_id, app_info);
-    tracked_apps_.insert(app_id);
   }
 
   if (app_ready) {
@@ -817,10 +814,8 @@
   const bool removed = apps->Remove(app_id, nullptr);
   DCHECK(removed);
 
-  DCHECK(tracked_apps_.count(app_id));
   for (auto& observer : observer_list_)
     observer.OnAppRemoved(app_id);
-  tracked_apps_.erase(app_id);
 
   // Remove local data on file system.
   content::BrowserThread::GetBlockingPool()->PostTask(