Don't process messages sent to dead routing ids.

content/test/test_render_frame_host.cc

Index: content/test/test_render_frame_host.cc
diff --git a/content/test/test_render_frame_host.cc b/content/test/test_render_frame_host.cc
index 5ae3fd8ef74f51fbc52a6482062f0c5356fa35bc..f1afce81555fea3357b67a6a8e2aefafea4c288e 100644
--- a/content/test/test_render_frame_host.cc
+++ b/content/test/test_render_frame_host.cc
@@ -75,6 +75,7 @@ MockRenderProcessHost* TestRenderFrameHost::GetProcess() {
 
 void TestRenderFrameHost::InitializeRenderFrameIfNeeded() {
   if (!render_view_host()->IsRenderViewLive()) {
+    render_view_host()->GetProcess()->Init();

[nasko, 2016/01/21 17:50:19]

Why do we need to call through render_view_host()? There is a GetProcess() on
the RFH and it should return the same one.

[ncarter (slow), 2016/01/26 23:08:21]

Sure, but this is here to prevent a DCHECK failure in the RVH call on the line
below.

     RenderViewHostTester::For(render_view_host())->CreateTestRenderView(
         base::string16(), MSG_ROUTING_NONE, MSG_ROUTING_NONE, -1, false);
   }