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 51cc5b2ee55f19a8cabaab2f292b128e4d95439e..cd273d47491cb162d4a2e2fd1b8e8eb8b9300cc0 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"
@@ -141,7 +142,10 @@ class SyncSetupHandler : public options2::OptionsPageUIHandler,
   // is running in the background.
   void DisplaySpinner();
 
-  // Returns true if this is the active login object.
+  // Displays an error dialog which shows timeout of starting the sync backend.
+  void DisplayTimeout();
+
+  // Returns true if this object is the active login object.
   bool IsActiveLogin() const;
 
   // Initiates a login via the signin manager.
@@ -192,6 +196,14 @@ class SyncSetupHandler : public options2::OptionsPageUIHandler,
   // When setup starts without login UI, do not retry login and fail.
   bool retry_on_signin_failure_;
 
+  // The OneShotTimer object used to timeout of starting the sync backend
+  // service.
+  scoped_ptr<base::OneShotTimer<SyncSetupHandler> > backend_start_timer_;
+
+  // Set to true when setup sync backend timeouts.  This is used to check if
+  // timeout dialog is visible and not to show other dialogs.
+  bool visible_timeout_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncSetupHandler);
 };