Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/chrome_content_browser_client.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_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "content/public/browser/content_browser_client.h"
 
 #if defined(OS_ANDROID)
 #include "base/memory/scoped_ptr.h"
 #endif
 
 namespace content {
 class QuotaPermissionContext;
 }
 
 namespace extensions {
 class Extension;
 }
 
-class PrefServiceSyncable;
+class PrefRegistrySyncable;
 
 namespace chrome {
 
 class ChromeContentBrowserClient : public content::ContentBrowserClient {
  public:
   ChromeContentBrowserClient();
   virtual ~ChromeContentBrowserClient();
 
-  static void RegisterUserPrefs(PrefServiceSyncable* prefs);
+  static void RegisterUserPrefs(PrefRegistrySyncable* registry);
 
   virtual content::BrowserMainParts* CreateBrowserMainParts(
       const content::MainFunctionParams& parameters) OVERRIDE;
   virtual content::WebContentsView* OverrideCreateWebContentsView(
       content::WebContents* web_contents,
       content::RenderViewHostDelegateView** render_view_host_delegate_view)
           OVERRIDE;
   virtual std::string GetStoragePartitionIdForSite(
       content::BrowserContext* browser_context,
       const GURL& site) OVERRIDE;
@@ skipping 218 matching lines @@
   // Cached version of the locale so we can return the locale on the I/O
   // thread.
   std::string io_thread_application_locale_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_