Revert of Delete base/prefs and update callers to use components.

components/content_settings/core/browser/content_settings_policy_provider.h

 // Copyright (c) 2011 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.
 
 #ifndef COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_POLICY_PROVIDER_H_
 #define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_POLICY_PROVIDER_H_
 
 // A content settings provider that takes its settings out of policies.
 
 #include <vector>
 
 #include "base/macros.h"
+#include "base/prefs/pref_change_registrar.h"
 #include "base/synchronization/lock.h"
 #include "components/content_settings/core/browser/content_settings_observable_provider.h"
 #include "components/content_settings/core/browser/content_settings_origin_identifier_value_map.h"
-#include "components/prefs/pref_change_registrar.h"
 
 class PrefService;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace content_settings {
 
 // PolicyProvider that provides managed content-settings.
@@ skipping 51 matching lines @@
   // Used around accesses to the |value_map_| object to guarantee
   // thread safety.
   mutable base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyProvider);
 };
 
 }  // namespace content_settings
 
 #endif  // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_POLICY_PROVIDER_H_