components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/search_engines/template_url_service_factory.h

Index: chrome/browser/search_engines/template_url_service_factory.h
diff --git a/chrome/browser/search_engines/template_url_service_factory.h b/chrome/browser/search_engines/template_url_service_factory.h
index a28c578ea84b2494f442a84c35b365987924e64d..107f167aef359eb9f9258bea4c68c271ed1fa46e 100644
--- a/chrome/browser/search_engines/template_url_service_factory.h
+++ b/chrome/browser/search_engines/template_url_service_factory.h
@@ -8,7 +8,6 @@
 #include "base/memory/singleton.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
-class PrefRegistrySyncable;
 class Profile;
 class TemplateURLService;
 
@@ -32,7 +31,8 @@ class TemplateURLServiceFactory : public ProfileKeyedServiceFactory {
   // ProfileKeyedServiceFactory:
   virtual ProfileKeyedService* BuildServiceInstanceFor(
       content::BrowserContext* profile) const OVERRIDE;
-  virtual void RegisterUserPrefs(PrefRegistrySyncable* registry) OVERRIDE;
+  virtual void RegisterUserPrefs(
+      user_prefs::PrefRegistrySyncable* registry) OVERRIDE;
   virtual content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const OVERRIDE;
   virtual bool ServiceIsNULLWhileTesting() const OVERRIDE;