app_list: Clear start page contents on NOTIFICATION_PROFILE_DESTROYED

chrome/browser/ui/app_list/start_page_service.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
 #define CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 21 matching lines @@
   // Gets the instance for the given profile.
   static StartPageService* Get(Profile* profile);
 
   content::WebContents* contents() { return contents_.get(); }
   RecommendedApps* recommended_apps() { return recommended_apps_.get(); }
 
  private:
   // A BrowserContextKeyedServiceFactory for this service.
   class Factory;
 
-  // ExitObserver to shutdown the service on exiting. WebContents depends
-  // on the profile and needs to be closed before the profile and its
+  // ProfileDestroyObserver to shutdown the service on exiting. WebContents
+  // depends on the profile and needs to be closed before the profile and its
   // keyed service shutdown.
-  class ExitObserver;
+  class ProfileDestroyObserver;
 
   explicit StartPageService(Profile* profile);
   virtual ~StartPageService();
 
   // BrowserContextKeyedService overrides:
   virtual void Shutdown() OVERRIDE;
 
   Profile* profile_;
   scoped_ptr<content::WebContents> contents_;
-  scoped_ptr<ExitObserver> exit_observer_;
+  scoped_ptr<ProfileDestroyObserver> profile_destroy_observer_;
   scoped_ptr<RecommendedApps> recommended_apps_;
 
   DISALLOW_COPY_AND_ASSIGN(StartPageService);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_