Create and add WebRTC filters.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index ca164cd0cb9e2353008ae4096dc618817d931030..94f8fcd87d83ded77721cec4fa56e68c7e5ea47b 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -70,6 +70,7 @@
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/renderer/renderer_webkitplatformsupport_impl.h"
+#include "content/renderer/webrtc_logging_message_filter.h"
 #include "grit/content_resources.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_forwarding_message_filter.h"
@@ -384,6 +385,12 @@ void RenderThreadImpl::Init() {
 
   AddFilter(new IndexedDBMessageFilter);
 
+#if defined(ENABLE_WEBRTC)
+  webrtc_logging_message_filter_ =
+      new WebRtcLoggingMessageFilter(GetIOMessageLoopProxy());
+  AddFilter(webrtc_logging_message_filter_.get());
+#endif
+
   GetContentClient()->renderer()->RenderThreadStarted();
 
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();