UMA log for audio_device Init and Start(Playout|Recording). Make Init return a more specific error …

webrtc/modules/audio_device/win/audio_device_wave_win.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 32 matching lines @@
 class AudioDeviceWindowsWave : public AudioDeviceGeneric
 {
 public:
     AudioDeviceWindowsWave(const int32_t id);
     ~AudioDeviceWindowsWave();
 
     // Retrieve the currently utilized audio layer
     virtual int32_t ActiveAudioLayer(AudioDeviceModule::AudioLayer& audioLayer) const;
 
     // Main initializaton and termination
-    virtual int32_t Init();
+    virtual InitStatus Init();
     virtual int32_t Terminate();
     virtual bool Initialized() const;
 
     // Device enumeration
     virtual int16_t PlayoutDevices();
     virtual int16_t RecordingDevices();
     virtual int32_t PlayoutDeviceName(
         uint16_t index,
         char name[kAdmMaxDeviceNameSize],
         char guid[kAdmMaxGuidSize]);
@@ skipping 270 matching lines @@
     uint16_t                          _recError;
 
     uint32_t                          _newMicLevel;
     uint32_t                          _minMicVolume;
     uint32_t                          _maxMicVolume;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_AUDIO_DEVICE_AUDIO_DEVICE_WAVE_WIN_H