Remove NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED from c/b/e/api

chrome/browser/extensions/api/settings_overrides/settings_overrides_api.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_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/scoped_observer.h"
 #include "chrome/browser/search_engines/template_url_service.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"
 
 class TemplateURL;
 
 namespace extensions {
+class ExtensionRegistry;
 
 class SettingsOverridesAPI : public BrowserContextKeyedAPI,
-                             public content::NotificationObserver {
+                             public ExtensionRegistryObserver {
  public:
   explicit SettingsOverridesAPI(content::BrowserContext* context);
   virtual ~SettingsOverridesAPI();
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<SettingsOverridesAPI>*
       GetFactoryInstance();
 
  private:
   friend class BrowserContextKeyedAPIFactory<SettingsOverridesAPI>;
 
   typedef std::set<scoped_refptr<const Extension> > PendingExtensions;
 
   // Wrappers around PreferenceAPI.
   void SetPref(const std::string& extension_id,
                const std::string& pref_key,
                base::Value* value);
   void UnsetPref(const std::string& extension_id,
                  const std::string& pref_key);
-  // 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;
+
   // KeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
   void OnTemplateURLsLoaded();
 
   void RegisterSearchProvider(const Extension* extension) const;
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() { return "SettingsOverridesAPI"; }
 
   Profile* profile_;
   TemplateURLService* url_service_;
 
   // List of extensions waiting for the TemplateURLService to Load to
   // have search provider registered.
   PendingExtensions pending_extensions_;
 
-  content::NotificationRegistrar registrar_;
+  // Listen to extension load, unloaded notifications.
+  ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   scoped_ptr<TemplateURLService::Subscription> template_url_sub_;
 
   DISALLOW_COPY_AND_ASSIGN(SettingsOverridesAPI);
 };
 
 template <>
 void BrowserContextKeyedAPIFactory<
     SettingsOverridesAPI>::DeclareFactoryDependencies();
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SETTINGS_OVERRIDES_SETTINGS_OVERRIDES_API_H_