Revert "Update includes for webrtc/{base => rtc_base} rename (1/3)"

webrtc/modules/audio_device/ios/audio_session_observer.h

 /*
  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_DEVICE_IOS_AUDIO_SESSION_OBSERVER_H_
 #define WEBRTC_MODULES_AUDIO_DEVICE_IOS_AUDIO_SESSION_OBSERVER_H_
 
-#include "webrtc/rtc_base/asyncinvoker.h"
-#include "webrtc/rtc_base/thread.h"
+#include "webrtc/base/asyncinvoker.h"
+#include "webrtc/base/thread.h"
 
 namespace webrtc {
 
 // Observer interface for listening to AVAudioSession events.
 class AudioSessionObserver {
  public:
   // Called when audio session interruption begins.
   virtual void OnInterruptionBegin() = 0;
 
   // Called when audio session interruption ends.
   virtual void OnInterruptionEnd() = 0;
 
   // Called when audio route changes.
   virtual void OnValidRouteChange() = 0;
 
   // Called when the ability to play or record changes.
   virtual void OnCanPlayOrRecordChange(bool can_play_or_record) = 0;
 
   virtual void OnChangedOutputVolume() = 0;
 
  protected:
   virtual ~AudioSessionObserver() {}
 };
 
 }  // namespace webrtc
 
 #endif  //  WEBRTC_MODULES_AUDIO_DEVICE_IOS_AUDIO_SESSION_OBSERVER_H_