CrOS: Do not allow notifications to be added during shutdown.

chrome/browser/lifetime/application_lifetime_aura.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/lifetime/application_lifetime.h"
 
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/common/chrome_switches.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/views/widget/widget.h"
 
 #if defined(USE_ASH)
 #include "ash/shell.h"
 #endif
 
 namespace chrome {
 
 void HandleAppExitingForPlatform() {
   // Close all non browser windows now. Those includes notifications
   // and windows created by Ash (launcher, background, etc).
-  g_browser_process->notification_ui_manager()->CancelAll();
+  g_browser_process->notification_ui_manager()->StartShutdown();
 
 #if defined(USE_ASH)
   // This may be called before |ash::Shell| is initialized when
   // XIOError is reported.  crbug.com/150633.
   if (ash::Shell::HasInstance()) {
     // Releasing the capture will close any menus that might be open:
     // http://crbug.com/134472
     aura::client::GetCaptureClient(ash::Shell::GetPrimaryRootWindow())->
         SetCapture(NULL);
   }
@@ skipping 10 matching lines @@
     // This might be called from FastShutdown() or CloseAllBrowsers(), but not
     // if something prevents a browser from closing before SetTryingToQuit()
     // gets called (e.g. browser->TabsNeedBeforeUnloadFired() is true).
     // NotifyAndTerminate does nothing if called more than once.
     NotifyAndTerminate(true);
   }
 #endif
 }
 
 }  // namespace chrome