Reland CL to implement browser-side logging to WebRtc log.

content/browser/renderer_host/media/audio_input_renderer_host.cc

Index: content/browser/renderer_host/media/audio_input_renderer_host.cc
diff --git a/content/browser/renderer_host/media/audio_input_renderer_host.cc b/content/browser/renderer_host/media/audio_input_renderer_host.cc
index ec619449772146448c72bda106464411286ccb98..93ed16ce07f03a06818ef1c639eff604ba962498 100644
--- a/content/browser/renderer_host/media/audio_input_renderer_host.cc
+++ b/content/browser/renderer_host/media/audio_input_renderer_host.cc
@@ -176,6 +176,8 @@ void AudioInputRendererHost::DoSendRecordingMessage(
 void AudioInputRendererHost::DoHandleError(
     media::AudioInputController* controller) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  MediaStreamManager::SendMessageToNativeLog(
+      "The AudioInputController signalled an error.");
 
   AudioEntry* entry = LookupByController(controller);
   if (!entry)
@@ -310,6 +312,8 @@ void AudioInputRendererHost::OnCreateStream(
   entry->stream_id = stream_id;
   audio_entries_.insert(std::make_pair(stream_id, entry.release()));
 
+  MediaStreamManager::SendMessageToNativeLog(
+      "Audio input stream created successfully.");
   audio_log_->OnCreated(stream_id, audio_params, device_id, std::string());
 }
 
@@ -349,6 +353,8 @@ void AudioInputRendererHost::OnSetVolume(int stream_id, double volume) {
 }
 
 void AudioInputRendererHost::SendErrorMessage(int stream_id) {
+  MediaStreamManager::SendMessageToNativeLog(
+      "An error occurred in AudioInputRendererHost.");
   Send(new AudioInputMsg_NotifyStreamStateChanged(
       stream_id, media::AudioInputIPCDelegate::kError));
 }