Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/extensions/extension_web_ui.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_EXTENSION_WEB_UI_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/bookmarks/bookmark_manager_extension_api.h"
 #include "chrome/browser/favicon/favicon_service.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/web_ui_controller.h"
 
 namespace content {
 class WebContents;
 }
 
-class PrefService;
+class PrefServiceSyncable;
 class Profile;
 
 // This class implements WebUI for extensions and allows extensions to put UI in
 // the main tab contents area. For example, each extension can specify an
 // "options_page", and that page is displayed in the tab contents area and is
 // hosted by this class.
 class ExtensionWebUI : public content::WebUIController {
  public:
   static const char kExtensionURLOverrides[];
 
@@ skipping 15 matching lines @@
   // (e.g. { "newtab": "chrome-extension://<id>/my_new_tab.html" }
   static void RegisterChromeURLOverrides(Profile* profile,
       const extensions::Extension::URLOverrideMap& overrides);
   static void UnregisterChromeURLOverrides(Profile* profile,
       const extensions::Extension::URLOverrideMap& overrides);
   static void UnregisterChromeURLOverride(const std::string& page,
                                           Profile* profile,
                                           const base::Value* override);
 
   // Called from BrowserPrefs
-  static void RegisterUserPrefs(PrefService* prefs);
+  static void RegisterUserPrefs(PrefServiceSyncable* prefs);
 
   // Get the favicon for the extension by getting an icon from the manifest.
   // Note. |callback| is always run asynchronously.
   static void GetFaviconForURL(
       Profile* profile,
       const GURL& page_url,
       const FaviconService::FaviconResultsCallback& callback);
 
  private:
   // Unregister the specified override, and if it's the currently active one,
   // ensure that something takes its place.
   static void UnregisterAndReplaceOverride(const std::string& page,
                                            Profile* profile,
                                            base::ListValue* list,
                                            const base::Value* override);
 
   // TODO(aa): This seems out of place. Why is it not with the event routers for
   // the other extension APIs?
   scoped_ptr<BookmarkManagerExtensionEventRouter>
       bookmark_manager_extension_event_router_;
 
   // The URL this WebUI was created for.
   GURL url_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_H_