Use ExtensionRegistryObserver instead of deprecated extension notification from c/b/extension

chrome/browser/extensions/extension_gcm_app_handler.h

 // Copyright 2014 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_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "components/gcm_driver/gcm_app_handler.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_registry_observer.h"
 #include "google_apis/gcm/gcm_client.h"
 
 class Profile;
 
 namespace content {
 class BrowserContext;
 }
 
 namespace gcm {
 class GCMDriver;
 class GCMProfileService;
 }
 
 namespace extensions {
 
 class ExtensionRegistry;
 class GcmJsEventRouter;
 
 // Defines the interface to provide handling logic for a given app.
 class ExtensionGCMAppHandler : public gcm::GCMAppHandler,
                                public BrowserContextKeyedAPI,
-                               public content::NotificationObserver,
                                public ExtensionRegistryObserver {
  public:
   explicit ExtensionGCMAppHandler(content::BrowserContext* context);
   virtual ~ExtensionGCMAppHandler();
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<ExtensionGCMAppHandler>*
   GetFactoryInstance();
 
   // gcm::GCMAppHandler implementation.
   virtual void ShutdownHandler() OVERRIDE;
   virtual void OnMessage(
       const std::string& app_id,
       const gcm::GCMClient::IncomingMessage& message) OVERRIDE;
   virtual void OnMessagesDeleted(const std::string& app_id) OVERRIDE;
   virtual void OnSendError(
       const std::string& app_id,
       const gcm::GCMClient::SendErrorDetails& send_error_details) OVERRIDE;
 
  protected:
   virtual void OnUnregisterCompleted(const std::string& app_id,
                                      gcm::GCMClient::Result result);
 
  private:
   friend class BrowserContextKeyedAPIFactory<ExtensionGCMAppHandler>;
 
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
   // ExtensionRegistryObserver implementation.
   virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
                                  const Extension* extension) OVERRIDE;
   virtual void OnExtensionUnloaded(
       content::BrowserContext* browser_context,
       const Extension* extension,
       UnloadedExtensionInfo::Reason reason) OVERRIDE;
+  virtual void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                                      const Extension* extension) OVERRIDE;
 
   gcm::GCMDriver* GetGCMDriver() const;
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() { return "ExtensionGCMAppHandler"; }
   static const bool kServiceIsNULLWhileTesting = true;
 
   Profile* profile_;
-  content::NotificationRegistrar registrar_;
 
   // Listen to extension load, unloaded notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
 #if !defined(OS_ANDROID)
   scoped_ptr<extensions::GcmJsEventRouter> js_event_router_;
 #endif
 
   base::WeakPtrFactory<ExtensionGCMAppHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionGCMAppHandler);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_GCM_APP_HANDLER_H_