Ensure that entries are correctly removed from the MimeHandlerViewContainer map

extensions/renderer/guest_view/guest_view_container.h

 // Copyright 2014 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 EXTENSIONS_RENDERER_GUEST_VIEW_GUEST_VIEW_CONTAINER_H_
 #define EXTENSIONS_RENDERER_GUEST_VIEW_GUEST_VIEW_CONTAINER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/renderer/browser_plugin_delegate.h"
 #include "ipc/ipc_message.h"
@@ skipping 10 matching lines @@
 
   void RenderFrameDestroyed();
 
   // BrowserPluginDelegate implementation.
   void SetElementInstanceID(int element_instance_id) override;
 
   int element_instance_id() const { return element_instance_id_; }
   int render_view_routing_id() const { return render_view_routing_id_; }
   content::RenderFrame* render_frame() const { return render_frame_; }
 
+  virtual void OnRenderFrameDestroyed() {}
+
  private:
   class RenderFrameLifetimeObserver;
 
   int element_instance_id_;
   const int render_view_routing_id_;
   content::RenderFrame* render_frame_;
   scoped_ptr<RenderFrameLifetimeObserver> render_frame_lifetime_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewContainer);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_GUEST_VIEW_GUEST_VIEW_CONTAINER_H_