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

chrome/browser/content_settings/content_settings_pref_provider_unittest.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/content_settings/content_settings_pref_provider.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/prefs/default_pref_store.h"
 #include "base/prefs/overlay_user_pref_store.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/public/pref_change_registrar.h"
 #include "base/prefs/testing_pref_store.h"
 #include "base/threading/platform_thread.h"
 #include "base/values.h"
 #include "chrome/browser/content_settings/content_settings_mock_observer.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
 #include "chrome/browser/prefs/browser_prefs.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service_mock_builder.h"
 #include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/testing_pref_service_syncable.h"
 #include "chrome/test/base/testing_profile.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/test/test_browser_thread.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::_;
 using content::BrowserThread;
 
 namespace content_settings {
 
 class DeadlockCheckerThread : public base::PlatformThread::Delegate {
@@ skipping 351 matching lines @@
     DictionaryValue* mutable_settings = update.Get();
     mutable_settings->SetWithoutPathExpansion("www.example.com,*",
                                               new base::DictionaryValue());
   }
   EXPECT_TRUE(observer.notification_received());
 
   provider.ShutdownOnUIThread();
 }
 
 }  // namespace content_settings