Detach RemoteFrame from the tree when deleting RenderFrameProxy.

content/renderer/render_frame_proxy.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 CONTENT_RENDERER_RENDER_FRAME_PROXY_H_
 #define CONTENT_RENDERER_RENDER_FRAME_PROXY_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
@@ skipping 80 matching lines @@
 
   // Out-of-process child frames receive a signal from RenderWidgetCompositor
   // when a compositor frame has committed.
   void DidCommitCompositorFrame();
 
   int routing_id() { return routing_id_; }
   RenderViewImpl* render_view() { return render_view_; }
   blink::WebRemoteFrame* web_frame() { return web_frame_; }
 
   // blink::WebRemoteFrameClient implementation:
+  virtual void frameDetached();
   virtual void postMessageEvent(
       blink::WebLocalFrame* sourceFrame,
       blink::WebRemoteFrame* targetFrame,
       blink::WebSecurityOrigin target,
       blink::WebDOMMessageEvent event);
   virtual void initializeChildFrame(
       const blink::WebRect& frame_rect,
       float scale_factor);
   virtual void navigate(const blink::WebURLRequest& request,
                         bool should_replace_current_entry);
@@ skipping 25 matching lines @@
   scoped_refptr<ChildFrameCompositingHelper> compositing_helper_;
 
   RenderViewImpl* render_view_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameProxy);
 };
 
 }  // namespace
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_PROXY_H_