Convert zoom callbacks to use CallbackRegistry

chrome/browser/profiles/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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_
 
 #include <string>
@@ skipping 173 matching lines @@
   // Updates the ProfileInfoCache with data from this profile.
   void UpdateProfileNameCache();
   void UpdateProfileAvatarCache();
 
   void GetCacheParameters(bool is_media_context,
                           base::FilePath* cache_path,
                           int* max_size);
 
   PrefProxyConfigTracker* CreateProxyConfigTracker();
 
-  content::HostZoomMap::ZoomLevelChangedCallback zoom_callback_;
+  scoped_ptr<content::HostZoomMap::Subscription> zoom_subscription_;
   PrefChangeRegistrar pref_change_registrar_;
 
   base::FilePath path_;
   base::FilePath base_cache_path_;
 
   // !!! BIG HONKING WARNING !!!
   //  The order of the members below is important. Do not change it unless
   //  you know what you're doing. Also, if adding a new member here make sure
   //  that the declaration occurs AFTER things it depends on as destruction
   //  happens in reverse order of declaration.
@@ skipping 59 matching lines @@
   //   components/browser_context_keyed_service/browser_context_keyed_service_factory.{h,cc}
 
   Profile::Delegate* delegate_;
 
   chrome_browser_net::Predictor* predictor_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IMPL_H_