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

chrome/browser/extensions/extension_gcm_app_handler.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_gcm_app_handler.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/services/gcm/gcm_driver.h"
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "chrome/browser/services/gcm/gcm_profile_service_factory.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/permissions/permissions_data.h"
 
 #if !defined(OS_ANDROID)
 #include "chrome/browser/extensions/api/gcm/gcm_api.h"
 #endif
 
 namespace extensions {
@@ skipping 14 matching lines @@
 BrowserContextKeyedAPIFactory<ExtensionGCMAppHandler>*
 ExtensionGCMAppHandler::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 ExtensionGCMAppHandler::ExtensionGCMAppHandler(content::BrowserContext* context)
     : profile_(Profile::FromBrowserContext(context)),
       extension_registry_observer_(this),
       weak_factory_(this) {
   extension_registry_observer_.Add(ExtensionRegistry::Get(profile_));
-  registrar_.Add(this,
-                 chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
-                 content::Source<Profile>(profile_));
-
 #if !defined(OS_ANDROID)
   js_event_router_.reset(new extensions::GcmJsEventRouter(profile_));
 #endif
 }
 
 ExtensionGCMAppHandler::~ExtensionGCMAppHandler() {
   const ExtensionSet& enabled_extensions =
       ExtensionRegistry::Get(profile_)->enabled_extensions();
   for (ExtensionSet::const_iterator extension = enabled_extensions.begin();
        extension != enabled_extensions.end();
@@ skipping 39 matching lines @@
 }
 
 void ExtensionGCMAppHandler::OnExtensionUnloaded(
     content::BrowserContext* browser_context,
     const Extension* extension,
     UnloadedExtensionInfo::Reason reason) {
   if (IsGCMPermissionEnabled(extension))
     GetGCMDriver()->RemoveAppHandler(extension->id());
 }
 
-void ExtensionGCMAppHandler::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  DCHECK_EQ(chrome::NOTIFICATION_EXTENSION_UNINSTALLED, type);
-  const Extension* extension = content::Details<Extension>(details).ptr();
+void ExtensionGCMAppHandler::OnExtensionUninstalled(
+    content::BrowserContext* browser_context,
+    const Extension* extension) {
   if (IsGCMPermissionEnabled(extension)) {
     GetGCMDriver()->Unregister(
         extension->id(),
         base::Bind(&ExtensionGCMAppHandler::OnUnregisterCompleted,
                    weak_factory_.GetWeakPtr(),
                    extension->id()));
     GetGCMDriver()->RemoveAppHandler(extension->id());
   }
 }
 
 gcm::GCMDriver* ExtensionGCMAppHandler::GetGCMDriver() const {
   return gcm::GCMProfileServiceFactory::GetForProfile(profile_)->driver();
 }
 
 void ExtensionGCMAppHandler::OnUnregisterCompleted(
     const std::string& app_id, gcm::GCMClient::Result result) {
   // Nothing to do.
 }
 
 }  // namespace extensions