Don't leave a RenderFrameProxyHost for the current RenderFrameHost.

content/browser/frame_host/render_frame_host_manager.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_MANAGER_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 441 matching lines @@
   scoped_ptr<RenderFrameHostImpl> SetRenderFrameHost(
       scoped_ptr<RenderFrameHostImpl> render_frame_host);
 
   RenderFrameHostImpl* UpdateStateForNavigate(
       const NavigationEntryImpl& entry);
 
   // Called when a renderer process is starting to close.  We should not
   // schedule new navigations in its swapped out RenderFrameHosts after this.
   void RendererProcessClosing(RenderProcessHost* render_process_host);
 
+  // Helper method to delete a RenderFrameProxyHost from the list, if one exists
+  // for the given |instance|.
+  void DeleteRenderFrameProxyHost(SiteInstance* instance);
+
   // For use in creating RenderFrameHosts.
   FrameTreeNode* frame_tree_node_;
 
   // Our delegate, not owned by us. Guaranteed non-NULL.
   Delegate* delegate_;
 
   // Whether a navigation requiring different RenderFrameHosts is pending. This
   // is either for cross-site requests or when required for the process type
   // (like WebUI).
   bool cross_navigation_pending_;
@@ skipping 57 matching lines @@
   scoped_ptr<NavigationRequest> navigation_request_;
 
   base::WeakPtrFactory<RenderFrameHostManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_