Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index 85fcc4055f41ee6c919b25c141575beb12d64725..7653e0c103b1a217390a5f0c51675427ad389457 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -25,6 +25,7 @@ class ChromeNetLog;
 class ChromeResourceDispatcherHostDelegate;
 class CommandLine;
 class RemoteDebuggingServer;
+class PrefServiceSimple;
 
 #if defined(ENABLE_PLUGIN_INSTALLATION)
 class PluginsResourceService;
@@ -74,7 +75,7 @@ class BrowserProcessImpl : public BrowserProcess,
   virtual IOThread* io_thread() OVERRIDE;
   virtual WatchDogThread* watchdog_thread() OVERRIDE;
   virtual ProfileManager* profile_manager() OVERRIDE;
-  virtual PrefService* local_state() OVERRIDE;
+  virtual PrefServiceSimple* local_state() OVERRIDE;
   virtual net::URLRequestContextGetter* system_request_context() OVERRIDE;
   virtual chrome_variations::VariationsService* variations_service() OVERRIDE;
 #if defined(OS_CHROMEOS)
@@ -174,7 +175,7 @@ class BrowserProcessImpl : public BrowserProcess,
   scoped_ptr<ProfileManager> profile_manager_;
 
   bool created_local_state_;
-  scoped_ptr<PrefService> local_state_;
+  scoped_ptr<PrefServiceSimple> local_state_;
 
   bool created_icon_manager_;
   scoped_ptr<IconManager> icon_manager_;