Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/extensions/api/commands/command_service.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_EXTENSIONS_API_COMMANDS_COMMAND_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_API_COMMANDS_COMMAND_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/common/extensions/command.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_source.h"
 
-class PrefServiceSyncable;
+class PrefRegistrySyncable;
 class Profile;
 
 namespace base {
   class DictionaryValue;
 }
 
 namespace ui {
   class Accelerator;
 }
 
 namespace extensions {
 
 // This service keeps track of preferences related to extension commands
 // (assigning initial keybindings on install and removing them on deletion
 // and answers questions related to which commands are active.
 class CommandService : public ProfileKeyedAPI,
                        public content::NotificationObserver {
  public:
   // An enum specifying whether to fetch all extension commands or only active
   // ones.
   enum QueryType {
     ALL,
     ACTIVE_ONLY,
   };
 
   // Register prefs for keybinding.
-  static void RegisterUserPrefs(PrefServiceSyncable* user_prefs);
+  static void RegisterUserPrefs(PrefRegistrySyncable* registry);
 
   // Constructs a CommandService object for the given profile.
   explicit CommandService(Profile* profile);
   virtual ~CommandService();
 
   // ProfileKeyedAPI implementation.
   static ProfileKeyedAPIFactory<CommandService>* GetFactoryInstance();
 
   // Convenience method to get the CommandService for a profile.
   static CommandService* Get(Profile* profile);
@@ skipping 111 matching lines @@
 
   // A weak pointer to the profile we are associated with. Not owned by us.
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandService);
 };
 
 }  //  namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_COMMANDS_COMMAND_SERVICE_H_