Make RenderFrameHostManager swap RenderFrameHosts, not RenderViewHosts.

content/browser/frame_host/interstitial_page_impl.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_INTERSTITIAL_PAGE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 163 matching lines @@
   NotificationRegistrar notification_registrar_;
 
  private:
   class InterstitialPageRVHDelegateView;
 
   // Disable the interstitial:
   // - if it is not yet showing, then it won't be shown.
   // - any command sent by the RenderViewHost will be ignored.
   void Disable();
 
-  // Shutdown the RVH.  We will be deleted by the time this method returns.
-  void Shutdown(RenderViewHostImpl* render_view_host);
+  // Delete ourselves, causing Shutdown on the RVH to be called.
+  void Shutdown();
 
   void OnNavigatingAwayOrTabClosing();
 
   // Executes the passed action on the ResourceDispatcher (on the IO thread).
   // Used to block/resume/cancel requests for the RenderViewHost hidden by this
   // interstitial.
   void TakeActionOnResourceDispatcher(ResourceRequestAction action);
 
   // The contents in which we are displayed.  This is valid until Hide is
   // called, at which point it will be set to NULL because the WebContents
@@ skipping 27 matching lines @@
 
   // Whether this interstitial is enabled.  See Disable() for more info.
   bool enabled_;
 
   // Whether the Proceed or DontProceed methods have been called yet.
   ActionState action_taken_;
 
   // The RenderViewHost displaying the interstitial contents.  This is valid
   // until Hide is called, at which point it will be set to NULL, signifying
   // that shutdown has started.
+  // TODO(creis): This is now owned by the FrameTree.  We should route things
+  // through the tree's root RenderFrameHost instead.
   RenderViewHostImpl* render_view_host_;
 
   // The frame tree structure of the current page.
   FrameTree frame_tree_;
 
   // The IDs for the Render[View|Process]Host hidden by this interstitial.
   int original_child_id_;
   int original_rvh_id_;
 
   // Whether or not we should change the title of the contents when hidden (to
@@ skipping 25 matching lines @@
   base::WeakPtrFactory<InterstitialPageImpl> weak_ptr_factory_;
 
   scoped_refptr<SessionStorageNamespace> session_storage_namespace_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_