Don't process messages sent to dead routing ids.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 7803372e6d184c2394606b445367e68005d6c8e2..0503db20eb3886e25656fb20012295b85785b7a2 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -452,6 +452,10 @@ bool RenderFrameHostImpl::Send(IPC::Message* message) {
 }
 
 bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
+  // Only process messages if the RenderFrame is alive.
+  if (!render_frame_created_)
+    return false;
+
   // Filter out most IPC messages if this frame is swapped out.
   // We still want to handle certain ACKs to keep our state consistent.
   if (is_swapped_out()) {