content: convert zoom notifications to observer usage

chrome/browser/profiles/off_the_record_profile_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_PROFILES_OFF_THE_RECORD_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_OFF_THE_RECORD_PROFILE_IMPL_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "chrome/browser/profiles/off_the_record_profile_io_data.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_list.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/host_zoom_map.h"
 
 using base::Time;
 using base::TimeDelta;
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // OffTheRecordProfileImpl is a profile subclass that wraps an existing profile
 // to make it suitable for the incognito mode.
 //
 // Note: This class is a leaf class and is not intended for subclassing.
 // Providing this header file is for unit testing.
 //
 ////////////////////////////////////////////////////////////////////////////////
-class OffTheRecordProfileImpl : public Profile,
-                                public content::NotificationObserver {
+class OffTheRecordProfileImpl : public Profile {
  public:
   explicit OffTheRecordProfileImpl(Profile* real_profile);
   virtual ~OffTheRecordProfileImpl();
   void Init();
 
   // Profile implementation.
   virtual std::string GetProfileName() OVERRIDE;
   virtual Profile* GetOffTheRecordProfile() OVERRIDE;
   virtual void DestroyOffTheRecordProfile() OVERRIDE;
   virtual bool HasOffTheRecordProfile() OVERRIDE;
@@ skipping 57 matching lines @@
       GetMediaRequestContextForStoragePartition(
           const FilePath& partition_path,
           bool in_memory) OVERRIDE;
   virtual content::ResourceContext* GetResourceContext() OVERRIDE;
   virtual content::GeolocationPermissionContext*
       GetGeolocationPermissionContext() OVERRIDE;
   virtual content::SpeechRecognitionPreferences*
       GetSpeechRecognitionPreferences() OVERRIDE;
   virtual quota::SpecialStoragePolicy* GetSpecialStoragePolicy() OVERRIDE;
 
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
  private:
   FRIEND_TEST_ALL_PREFIXES(OffTheRecordProfileImplTest, GetHostZoomMap);
   void InitHostZoomMap();
 
 #if defined(OS_ANDROID)
   void UseSystemProxy();
 #endif
 
-  content::NotificationRegistrar registrar_;
+  void OnZoomLevelChanged(const std::string& host);
 
   // The real underlying profile.
   Profile* profile_;
 
   // Weak pointer owned by |profile_|.
   PrefServiceSyncable* prefs_;
 
   OffTheRecordProfileIOData::Handle io_data_;
 
   // We use a non-persistent content settings map for OTR.
   scoped_refptr<HostContentSettingsMap> host_content_settings_map_;
 
   // Time we were started.
   Time start_time_;
 
   FilePath last_selected_directory_;
 
   scoped_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
 
+  content::HostZoomMap::ZoomLevelChangedCallback zoom_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(OffTheRecordProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_OFF_THE_RECORD_PROFILE_IMPL_H_