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

chromeos/audio/audio_devices_pref_handler_impl.h

 // 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.
 
 #ifndef CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
 #define CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/observer_list.h"
+#include "base/prefs/pref_change_registrar.h"
 #include "base/values.h"
 #include "chromeos/audio/audio_devices_pref_handler.h"
 #include "chromeos/chromeos_export.h"
-#include "components/prefs/pref_change_registrar.h"
 
 class PrefRegistrySimple;
 class PrefService;
 
 namespace chromeos {
 
 // Class which implements AudioDevicesPrefHandler interface and register audio
 // preferences as well.
 class CHROMEOS_EXPORT AudioDevicesPrefHandlerImpl
     : public AudioDevicesPrefHandler {
@@ skipping 61 matching lines @@
 
   PrefChangeRegistrar pref_change_registrar_;
   base::ObserverList<AudioPrefObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDevicesPrefHandlerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_AUDIO_AUDIO_DEVICES_PREF_HANDLER_IMPL_H_