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

chrome/browser/content_settings/content_settings_default_provider.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_default_provider.h"
 
 #include <string>
 #include <vector>
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/content_settings/content_settings_rule.h"
 #include "chrome/browser/content_settings/content_settings_utils.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_pattern.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/user_metrics.h"
 #include "googleurl/src/gurl.h"
 
 using content::BrowserThread;
 using content::UserMetricsAction;
 
 namespace {
@@ skipping 285 matching lines @@
   // Migrate obsolete cookie prompt mode.
   if (ValueToContentSetting(
           default_settings_[CONTENT_SETTINGS_TYPE_COOKIES].get()) ==
               CONTENT_SETTING_ASK) {
     default_settings_[CONTENT_SETTINGS_TYPE_COOKIES].reset(
         Value::CreateIntegerValue(CONTENT_SETTING_BLOCK));
   }
 }
 
 }  // namespace content_settings