Introduce //components/user_prefs, use to eliminate c/b/prefs dependency in Autofill.

chrome/browser/plugins/plugin_prefs_factory.cc

 // 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.
 
 #include "chrome/browser/plugins/plugin_prefs_factory.h"
 
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 
 // static
 PluginPrefsFactory* PluginPrefsFactory::GetInstance() {
   return Singleton<PluginPrefsFactory>::get();
 }
 
 // static
 scoped_refptr<PluginPrefs> PluginPrefsFactory::GetPrefsForProfile(
     Profile* profile) {
   return static_cast<PluginPrefs*>(
@@ skipping 51 matching lines @@
   return true;
 }
 
 bool PluginPrefsFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 bool PluginPrefsFactory::ServiceIsCreatedWithProfile() const {
   return true;
 }