Create RenderFrame/RenderFrameHost for the main frame of a page.

content/public/test/mock_render_thread.h

Index: content/public/test/mock_render_thread.h
diff --git a/content/public/test/mock_render_thread.h b/content/public/test/mock_render_thread.h
index d90275c2c787137c1605185cbd2c3816e33eb8c2..b4503f88d3265c2983536c80cf7904b9c2fd3c88 100644
--- a/content/public/test/mock_render_thread.h
+++ b/content/public/test/mock_render_thread.h
@@ -120,6 +120,7 @@ class MockRenderThread : public RenderThread {
   void OnCreateWindow(
     const ViewHostMsg_CreateWindow_Params& params,
     int* route_id,
+    int* main_frame_route_id,
     int* surface_id,
     int64* cloned_session_storage_namespace_id);
 
@@ -146,6 +147,7 @@ class MockRenderThread : public RenderThread {
 
   // Routing id that will be assigned to a CreateWindow Widget.
   int32 new_window_routing_id_;
+  int32 new_window_main_frame_routing_id_;
 
   // The last known good deserializer for sync messages.
   scoped_ptr<IPC::MessageReplyDeserializer> reply_deserializer_;