Make RenderFrame(Host) own a RenderWidget(Host).

content/browser/frame_host/render_frame_host_factory.h

 // Copyright 2013 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_FRAME_HOST_RENDER_FRAME_HOST_FACTORY_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_FACTORY_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 class FrameTree;
 class FrameTreeNode;
 class RenderFrameHostDelegate;
 class RenderFrameHostImpl;
 class RenderViewHostImpl;
+class RenderWidgetHostDelegate;
 
 // A factory for creating RenderFrameHosts. There is a global factory function
 // that can be installed for the purposes of testing to provide a specialized
 // RenderFrameHostImpl class.
 class CONTENT_EXPORT RenderFrameHostFactory {
  public:
   // Creates a new RenderFrameHostImpl using the currently registered factory,
   // or a regular RenderFrameHostImpl if no factory is registered.
   static scoped_ptr<RenderFrameHostImpl> Create(
       RenderViewHostImpl* render_view_host,
       RenderFrameHostDelegate* delegate,
+      RenderWidgetHostDelegate* rwh_delegate,
       FrameTree* frame_tree,
       FrameTreeNode* frame_tree_node,
       int routing_id,
       int flags);
 
   // Returns true if there is currently a globally-registered factory.
   static bool has_factory() { return !!factory_; }
 
  protected:
   RenderFrameHostFactory() {}
   virtual ~RenderFrameHostFactory() {}
 
   // You can derive from this class and specify an implementation for this
   // function to create an alternate kind of RenderFrameHostImpl for testing.
   virtual scoped_ptr<RenderFrameHostImpl> CreateRenderFrameHost(
       RenderViewHostImpl* render_view_host,
       RenderFrameHostDelegate* delegate,
+      RenderWidgetHostDelegate* rwh_delegate,
       FrameTree* frame_tree,
       FrameTreeNode* frame_tree_node,
       int routing_id,
       int flags) = 0;
 
   // Registers a factory to be called when new RenderFrameHostImpls are created.
   // We have only one global factory, so there must be no factory registered
   // before the call. This class does NOT take ownership of the pointer.
   static void RegisterFactory(RenderFrameHostFactory* factory);
 
   // Unregister the previously registered factory. With no factory registered,
   // regular RenderFrameHostImpls will be created.
   static void UnregisterFactory();
 
  private:
   // The current globally registered factory. This is NULL when we should create
   // regular RenderFrameHostImpls.
   static RenderFrameHostFactory* factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_FACTORY_H_