Remove AudioDeviceObserver and make ADM not inherit from the Module interface.

modules/audio_device/include/mock_audio_device.h

 /*
  *  Copyright (c) 2015 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_MOCK_AUDIO_DEVICE_H_
 #define MODULES_AUDIO_DEVICE_INCLUDE_MOCK_AUDIO_DEVICE_H_
 
 #include <string>
 
 #include "modules/audio_device/include/audio_device.h"
 #include "test/gmock.h"
 
 namespace webrtc {
 namespace test {
 
 class MockAudioDeviceModule : public AudioDeviceModule {
  public:
-  // Module.
-  MOCK_METHOD0(TimeUntilNextProcess, int64_t());
-  MOCK_METHOD0(Process, void());
-  MOCK_METHOD1(ProcessThreadAttached, void(ProcessThread*));
-  // RefCountedModule.
+  // RefCounted
   MOCK_CONST_METHOD0(AddRef, int32_t());
   MOCK_CONST_METHOD0(Release, int32_t());
   // AudioDeviceModule.
   MOCK_CONST_METHOD1(ActiveAudioLayer, int32_t(AudioLayer* audioLayer));
   MOCK_CONST_METHOD0(LastError, ErrorCode());
-  MOCK_METHOD1(RegisterEventObserver,
-               int32_t(AudioDeviceObserver* eventCallback));
   MOCK_METHOD1(RegisterAudioCallback, int32_t(AudioTransport* audioCallback));
   MOCK_METHOD0(Init, int32_t());
   MOCK_METHOD0(Terminate, int32_t());
   MOCK_CONST_METHOD0(Initialized, bool());
   MOCK_METHOD0(PlayoutDevices, int16_t());
   MOCK_METHOD0(RecordingDevices, int16_t());
   MOCK_METHOD3(PlayoutDeviceName, int32_t(uint16_t index,
                                           char name[kAdmMaxDeviceNameSize],
                                           char guid[kAdmMaxGuidSize]));
   MOCK_METHOD3(RecordingDeviceName, int32_t(uint16_t index,
@@ skipping 61 matching lines @@
   MOCK_METHOD1(EnableBuiltInNS, int32_t(bool enable));
 #if defined(WEBRTC_IOS)
   MOCK_CONST_METHOD1(GetPlayoutAudioParameters, int(AudioParameters* params));
   MOCK_CONST_METHOD1(GetRecordAudioParameters, int(AudioParameters* params));
 #endif  // WEBRTC_IOS
 };
 }  // namespace test
 }  // namespace webrtc
 
 #endif  // MODULES_AUDIO_DEVICE_INCLUDE_MOCK_AUDIO_DEVICE_H_