Log audio system used to WebRTC log.

media/audio/android/audio_manager_android.cc

Index: media/audio/android/audio_manager_android.cc
diff --git a/media/audio/android/audio_manager_android.cc b/media/audio/android/audio_manager_android.cc
index 9f18d5d713ae76f6122bbe0ceaa8fb6a9b097344..36ac4261d030c2247e3614e8ab1c6ef52d31abbc 100644
--- a/media/audio/android/audio_manager_android.cc
+++ b/media/audio/android/audio_manager_android.cc
@@ -44,6 +44,8 @@ const int kMaxOutputStreams = 10;
 const int kDefaultInputBufferSize = 1024;
 const int kDefaultOutputBufferSize = 2048;
 
+const char kAudioManagerName[] = "Android";
+
 }  // namespace
 
 ScopedAudioManagerPtr CreateAudioManager(
@@ -161,6 +163,10 @@ AudioParameters AudioManagerAndroid::GetInputStreamParameters(
   return params;
 }
 
+const char* AudioManagerAndroid::GetName() {
+  return kAudioManagerName;
+}
+
 AudioOutputStream* AudioManagerAndroid::MakeAudioOutputStream(
     const AudioParameters& params,
     const std::string& device_id,