Implement browser-side logging to WebRtc log

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright (c) 2012 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1502 matching lines @@
 void RenderProcessHostImpl::DisableAecDump() {
   // Posting on the FILE thread and then replying back on the UI thread is only
   // for avoiding races between enable and disable. Nothing is done on the FILE
   // thread.
   BrowserThread::PostTaskAndReply(
       BrowserThread::FILE, FROM_HERE,
       base::Bind(&DisableAecDumpOnFileThread),
       base::Bind(&RenderProcessHostImpl::SendDisableAecDumpToRenderer,
                  weak_factory_.GetWeakPtr()));
 }
+
+void RenderProcessHostImpl::SetWebRtcLogMessageCallback(

[jam, 2014/01/22 03:20:01]

nit: we try to sort the methods in the cc file to match the order of the header,
so please put these methods in their order even if htat means multiple ifdefs in
the file

[vrk (LEFT CHROMIUM), 2014/01/22 04:38:06]

Done.

+    base::Callback<void(const std::string&)> callback) {
+  DCHECK(webrtc_log_message_callback_.is_null());
+  webrtc_log_message_callback_ = callback;
+}
+
+void RenderProcessHostImpl::WebRtcLogMessage(const std::string& message) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  if (!webrtc_log_message_callback_.is_null())
+    webrtc_log_message_callback_.Run(message);
+}
 #endif
 
 IPC::ChannelProxy* RenderProcessHostImpl::GetChannel() {
   return channel_.get();
 }
 
 void RenderProcessHostImpl::AddFilter(BrowserMessageFilter* filter) {
   channel_->AddFilter(filter->GetFilter());
 }
 
@@ skipping 493 matching lines @@
     return;
   Send(new MediaStreamMsg_EnableAecDump(file_for_transit));
 }
 
 void RenderProcessHostImpl::SendDisableAecDumpToRenderer() {
   Send(new MediaStreamMsg_DisableAecDump());
 }
 #endif
 
 }  // namespace content