arc: Add a global 5 minute timeout for ARC opt-in

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 1a8433e8b02d92c79ed5d17faeda77567aac3616..3260174daf2d6c940c32ed74e45004dde41f2800 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.h
+++ b/chrome/browser/chromeos/arc/arc_auth_service.h
@@ -12,6 +12,7 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
+#include "base/timer/timer.h"
 #include "chrome/browser/chromeos/arc/arc_android_management_checker_delegate.h"
 #include "chrome/browser/chromeos/arc/arc_auth_code_fetcher_delegate.h"
 #include "chrome/browser/chromeos/arc/arc_auth_context_delegate.h"
@@ -219,6 +220,7 @@ class ArcAuthService : public ArcService,
   void CheckAndroidManagement(bool background_mode);
   void StartArcIfSignedIn();
   void OnArcDataRemoved(bool success);
+  void OnArcSignInTimeout();
 
   // Unowned pointer. Keeps current profile.
   Profile* profile_ = nullptr;
@@ -238,7 +240,7 @@ class ArcAuthService : public ArcService,
   base::string16 ui_page_status_;
   bool clear_required_ = false;
   bool reenable_arc_ = false;
-  bool waiting_for_reply_ = false;
+  base::OneShotTimer arc_sign_in_timer_;
 
   std::unique_ptr<ArcAuthContext> context_;
   std::unique_ptr<ArcAuthCodeFetcher> auth_code_fetcher_;