arc: Make Play Store item persistance in shelf.

chrome/browser/chromeos/arc/arc_auth_service.h

Index: chrome/browser/chromeos/arc/arc_auth_service.h
diff --git a/chrome/browser/chromeos/arc/arc_auth_service.h b/chrome/browser/chromeos/arc/arc_auth_service.h
index d797dfa2f749c6d2e254fa2b651e6cc25df6899d..94f81606fcd4c15a87c09ad5b2803bffe0bf7794 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.h
+++ b/chrome/browser/chromeos/arc/arc_auth_service.h
@@ -89,6 +89,9 @@ class ArcAuthService : public ArcService,
   // Checks if OptIn verification was disabled by switch in command line.
   static bool IsOptInVerificationDisabled();
 
+  // Returns true if Arc is allowed to run for the current session.
+  bool IsAllowed() const;
+
   void OnPrimaryUserProfilePrepared(Profile* profile);
   void Shutdown();
 
@@ -125,6 +128,7 @@ class ArcAuthService : public ArcService,
   // Called from Arc support platform app when user cancels signing.
   void CancelAuthCode();
 
+  bool IsArcEnabled();
   void EnableArc();
   void DisableArc();