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

chrome/test/base/testing_pref_service_syncable.cc

 // Copyright (c) 2013 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/test/base/testing_pref_service_syncable.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/pref_value_store.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 template<>
 TestingPrefServiceBase<PrefServiceSyncable, PrefRegistrySyncable>::
 TestingPrefServiceBase(TestingPrefStore* managed_prefs,
                        TestingPrefStore* user_prefs,
                        TestingPrefStore* recommended_prefs,
                        PrefRegistrySyncable* pref_registry,
                        PrefNotifierImpl* pref_notifier)
     : PrefServiceSyncable(
@@ skipping 25 matching lines @@
         new PrefRegistrySyncable(),
         new PrefNotifierImpl()) {
 }
 
 TestingPrefServiceSyncable::~TestingPrefServiceSyncable() {
 }
 
 PrefRegistrySyncable* TestingPrefServiceSyncable::registry() {
   return static_cast<PrefRegistrySyncable*>(DeprecatedGetPrefRegistry());
 }