Detach old frame on WebFrame::swap.

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"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/web/WebRemoteFrame.h"
 #include "third_party/WebKit/public/web/WebRemoteFrameClient.h"
 #include "url/origin.h"
 
 struct FrameMsg_BuffersSwapped_Params;
 struct FrameMsg_CompositorFrameSwapped_Params;
 
 namespace blink {
 class WebInputEvent;
+enum class WebDetachReason;
 }
 
 namespace content {
 
 class ChildFrameCompositingHelper;
 class RenderFrameImpl;
 class RenderViewImpl;
 struct FrameReplicationState;
 
 // When a page's frames are rendered by multiple processes, each renderer has a
@@ skipping 73 matching lines @@
   // for a WebRemoteFrame in the frame tree. In this case, this WebRemoteFrame
   // is not attached to the frame tree and there is no blink::Frame associated
   // with it, so it is not in state where most operations on it will succeed.
   bool IsMainFrameDetachedFromTree() const;
 
   int routing_id() { return routing_id_; }
   RenderViewImpl* render_view() { return render_view_; }
   blink::WebRemoteFrame* web_frame() { return web_frame_; }
 
   // blink::WebRemoteFrameClient implementation:
+  // TODO(lfg): Remove this method once the blink patch lands.
   virtual void frameDetached();
+  virtual void frameDetached(blink::WebDetachReason reason);
   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 33 matching lines @@
   scoped_refptr<ChildFrameCompositingHelper> compositing_helper_;
 
   RenderViewImpl* render_view_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameProxy);
 };
 
 }  // namespace
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_PROXY_H_