Replace RefCountImpl with rtc::RefCountedObject.

webrtc/modules/audio_device/include/audio_device.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 193 matching lines @@
     return -1;
   }
   virtual int GetRecordAudioParameters(AudioParameters* params) const {
     return -1;
   }
 
  protected:
   virtual ~AudioDeviceModule() {}
 };
 
-AudioDeviceModule* CreateAudioDeviceModule(
-    int32_t id, AudioDeviceModule::AudioLayer audioLayer);
-
 }  // namespace webrtc
 
 #endif  // MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_H_