Replace WEBRTC_TRACE logging in audio_device_alsa_linux.cc

webrtc/modules/audio_device/linux/audio_device_alsa_linux.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 168 matching lines @@
 
     AudioDeviceBuffer* _ptrAudioBuffer;
 
     rtc::CriticalSection _critSect;
 
     // TODO(pbos): Make plain members and start/stop instead of resetting these
     // pointers. A thread can be reused.
     std::unique_ptr<rtc::PlatformThread> _ptrThreadRec;
     std::unique_ptr<rtc::PlatformThread> _ptrThreadPlay;
 
-    int32_t _id;
-
     AudioMixerManagerLinuxALSA _mixerManager;
 
     uint16_t _inputDeviceIndex;
     uint16_t _outputDeviceIndex;
     bool _inputDeviceIsSpecified;
     bool _outputDeviceIsSpecified;
 
     snd_pcm_t* _handleRecord;
     snd_pcm_t* _handlePlayout;
 
@@ skipping 39 matching lines @@
 
     char _oldKeyState[32];
 #if defined(USE_X11)
     Display* _XDisplay;
 #endif
 };
 
 }
 
 #endif  // MODULES_AUDIO_DEVICE_MAIN_SOURCE_LINUX_AUDIO_DEVICE_ALSA_LINUX_H_