Refactor the P2PSocketDispatcher to be created on the RenderThread instead of the RenderView.

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 1638345b3f99a485e4d67710d2e0d4e3b2ea1d3c..dd0fa7cd171965ce0246eb772d4c5814450aee56 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -65,6 +65,7 @@
 #include "content/renderer/media/media_stream_center.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
 #include "content/renderer/media/video_capture_message_filter.h"
+#include "content/renderer/p2p/socket_dispatcher.h"
 #include "content/renderer/plugin_channel_host.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_view_impl.h"
@@ -306,6 +307,11 @@ void RenderThreadImpl::Init() {
   db_message_filter_ = new DBMessageFilter();
   AddFilter(db_message_filter_.get());
 
+#if defined(ENABLE_WEBRTC)
+  p2p_socket_dispatcher_ = new content::P2PSocketDispatcher(
+      GetIOMessageLoopProxy());
+  AddFilter(p2p_socket_dispatcher_.get());
+#endif
   vc_manager_ = new VideoCaptureImplManager();
   AddFilter(vc_manager_->video_capture_message_filter());