Adding GetAudioInputDeviceNames to AudioManager, this function is supposed to do device enumerati...

media/audio/mac/audio_manager_mac.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <CoreAudio/AudioHardware.h>
 
 #include "base/sys_info.h"
 #include "media/audio/fake_audio_input_stream.h"
 #include "media/audio/fake_audio_output_stream.h"
 #include "media/audio/mac/audio_input_mac.h"
@@ skipping 109 matching lines @@
 }
 
 void AudioManagerMac::MuteAll() {
   // TODO(cpu): implement.
 }
 
 void AudioManagerMac::UnMuteAll() {
   // TODO(cpu): implement.
 }
 
+void AudioManagerMac::GetAudioInputDeviceNames(
+    media::AudioDeviceNames* device_names) {
+  // TODO(xians): query a full list of valid devices.
+  if (HasAudioInputDevices()) {
+    // Add the default device to the list.
+    // We use index 0 to make up the unique_id to identify the
+    // default devices.
+    media::AudioDeviceName name;
+    name.device_name = AudioManagerBase::kDefaultDeviceName;
+    name.unique_id = "0";
+    device_names->push_back(name);
+  }
+}
+
 // Called by the stream when it has been released by calling Close().
 void AudioManagerMac::ReleaseOutputStream(AudioOutputStream* stream) {
   DCHECK(stream);
   num_output_streams_--;
   delete stream;
 }
 
 // Called by the stream when it has been released by calling Close().
 void AudioManagerMac::ReleaseInputStream(PCMQueueInAudioInputStream* stream) {
   delete stream;
 }
 
 // static
 AudioManager* AudioManager::CreateAudioManager() {
   return new AudioManagerMac();
 }