Give the main frame a RenderWidget.

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 169 matching lines @@
   virtual void Init();
 
   // Initializes a RenderWidgetHost that is attached to a RenderFrameHost.
   void InitForFrame();
 
   // Signal whether this RenderWidgetHost is owned by a RenderFrameHost, in
   // which case it does not do self-deletion.
   void set_owned_by_render_frame_host(bool owned_by_rfh) {
     owned_by_render_frame_host_ = owned_by_rfh;
   }
+  bool owned_by_render_frame_host() const {
+    return owned_by_render_frame_host_;
+  }
 
   // Tells the renderer to die and then calls Destroy().
   virtual void Shutdown();
 
   // IPC::Listener
   bool OnMessageReceived(const IPC::Message& msg) override;
 
   // Sends a message to the corresponding object in the renderer.
   bool Send(IPC::Message* msg) override;
 
@@ skipping 644 matching lines @@
   base::TimeDelta new_content_rendering_delay_;
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_