Adds routed interface support between RenderFrameHost and RenderFrame

ipc/message_router.cc

Index: ipc/message_router.cc
diff --git a/ipc/message_router.cc b/ipc/message_router.cc
index aaf4a1f7d8db17f5dcae0822f83fe9600364feb6..edc1a86f2ba89d782b5d9beff95c0e09efa610ba 100644
--- a/ipc/message_router.cc
+++ b/ipc/message_router.cc
@@ -37,6 +37,10 @@ void MessageRouter::RemoveRoute(int32_t routing_id) {
   routes_.Remove(routing_id);
 }
 
+Listener* MessageRouter::GetRoute(int32_t routing_id) {
+  return routes_.Lookup(routing_id);
+}
+
 bool MessageRouter::OnMessageReceived(const IPC::Message& msg) {
   if (msg.routing_id() == MSG_ROUTING_CONTROL)
     return OnControlMessageReceived(msg);