Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

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/host_zoom_map.h"
 
 using base::Time;
 using base::TimeDelta;
 
+class PrefServiceSyncable;
+
 ////////////////////////////////////////////////////////////////////////////////
 //
 // 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:
   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;
   virtual Profile* GetOriginalProfile() OVERRIDE;
   virtual ExtensionService* GetExtensionService() OVERRIDE;
   virtual ExtensionSpecialStoragePolicy*
       GetExtensionSpecialStoragePolicy() OVERRIDE;
   virtual policy::ManagedModePolicyProvider*
       GetManagedModePolicyProvider() OVERRIDE;
   virtual policy::PolicyService* GetPolicyService() OVERRIDE;
-  virtual PrefServiceSyncable* GetPrefs() OVERRIDE;
-  virtual PrefServiceSyncable* GetOffTheRecordPrefs() OVERRIDE;
+  virtual PrefService* GetPrefs() OVERRIDE;
+  virtual PrefService* GetOffTheRecordPrefs() OVERRIDE;
   virtual net::URLRequestContextGetter*
       GetRequestContextForExtensions() OVERRIDE;
   virtual net::URLRequestContextGetter* CreateRequestContext(
       scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
           blob_protocol_handler,
       scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
           file_system_protocol_handler,
       scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
           developer_protocol_handler,
       scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
@@ skipping 93 matching lines @@
   base::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_