Move ADM Create() method to public interface.

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.
  */
 
 #ifndef MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_H_
 #define MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_H_
 
+#include "webrtc/base/scoped_ref_ptr.h"
 #include "webrtc/modules/audio_device/include/audio_device_defines.h"
 #include "webrtc/modules/include/module.h"
 
 namespace webrtc {
 
 class AudioDeviceModule : public RefCountedModule {
  public:
   enum ErrorCode {
     kAdmErrNone = 0,
     kAdmErrArgument = 1
@@ skipping 20 matching lines @@
     kAdaptiveBufferSize = 1
   };
 
   enum ChannelType {
     kChannelLeft = 0,
     kChannelRight = 1,
     kChannelBoth = 2
   };
 
  public:
+  // Create an ADM.
+  static rtc::scoped_refptr<AudioDeviceModule> Create(
+      const int32_t id,
+      const AudioLayer audio_layer);
+
   // Retrieve the currently utilized audio layer
   virtual int32_t ActiveAudioLayer(AudioLayer* audioLayer) const = 0;
 
   // Error handling
   virtual ErrorCode LastError() const = 0;
   virtual int32_t RegisterEventObserver(AudioDeviceObserver* eventCallback) = 0;
 
   // Full-duplex transportation of PCM audio
   virtual int32_t RegisterAudioCallback(AudioTransport* audioCallback) = 0;
 
@@ skipping 143 matching lines @@
     return -1;
   }
 
  protected:
   virtual ~AudioDeviceModule() {}
 };
 
 }  // namespace webrtc
 
 #endif  // MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_H_