Set timeout in sync setup

chrome/browser/ui/webui/sync_setup_handler.h

Index: chrome/browser/ui/webui/sync_setup_handler.h
diff --git a/chrome/browser/ui/webui/sync_setup_handler.h b/chrome/browser/ui/webui/sync_setup_handler.h
index 155c21c6938c495a29e031d6e5c28155c18af90f..f5ddd9263197c6ca75f62463213622a34284d074 100644
--- a/chrome/browser/ui/webui/sync_setup_handler.h
+++ b/chrome/browser/ui/webui/sync_setup_handler.h
@@ -7,6 +7,7 @@
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/timer.h"
 #include "chrome/browser/signin/signin_tracker.h"
 #include "chrome/browser/ui/webui/options2/options_ui2.h"
 #include "chrome/browser/ui/webui/signin/login_ui_service.h"
@@ -139,6 +140,9 @@ class SyncSetupHandler : public options2::OptionsPageUIHandler,
   // is running in the background.
   void DisplaySpinner();
 
+  // Displays an error dialog which shows timeout of starting the sync backend.
+  void DisplayTimeout();
+
   // Returns true if we're the active login object.
   bool IsActiveLogin() const;
 
@@ -186,6 +190,10 @@ class SyncSetupHandler : public options2::OptionsPageUIHandler,
   // The error from the last signin attempt.
   GoogleServiceAuthError last_signin_error_;
 
+  // The OneShotTimer object used to timeout of starting the sync backend
+  // service.
+  scoped_ptr<base::OneShotTimer<SyncSetupHandler> > backend_start_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncSetupHandler);
 };