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

content/browser/renderer_host/render_widget_helper.h

Index: content/browser/renderer_host/render_widget_helper.h
diff --git a/content/browser/renderer_host/render_widget_helper.h b/content/browser/renderer_host/render_widget_helper.h
index 733130af2a112b499a42c53868d3b63233f99c67..638c9a76d07bc7beffa2ed6fce9e72e48f3ad84c 100644
--- a/content/browser/renderer_host/render_widget_helper.h
+++ b/content/browser/renderer_host/render_widget_helper.h
@@ -148,6 +148,7 @@ class RenderWidgetHelper
       bool no_javascript_access,
       base::ProcessHandle render_process,
       int* route_id,
+      int* main_frame_route_id,
       int* surface_id,
       SessionStorageNamespace* session_storage_namespace);
   void CreateNewWidget(int opener_id,
@@ -196,6 +197,7 @@ class RenderWidgetHelper
   void OnCreateWindowOnUI(
       const ViewHostMsg_CreateWindow_Params& params,
       int route_id,
+      int main_frame_route_id,
       SessionStorageNamespace* session_storage_namespace);
 
   // Called on the IO thread after a window was created on the UI thread.