Check if an iframe doesn't get detached twice

third_party/WebKit/Source/core/frame/LocalFrame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 243 matching lines @@
   int m_navigationDisableCount;
 
   float m_pageZoomFactor;
   float m_textZoomFactor;
 
   bool m_inViewSourceMode;
 
   Member<InstrumentingAgents> m_instrumentingAgents;
 
   InterfaceProvider* const m_interfaceProvider;
+  bool m_detached;
 };
 
 inline void LocalFrame::init() {
   m_loader.init();
 }
 
 inline LocalDOMWindow* LocalFrame::localDOMWindow() const {
   return m_domWindow.get();
 }
 
@@ skipping 89 matching lines @@
   explicit ScopedFrameBlamer(LocalFrame*);
   ~ScopedFrameBlamer();
 
  private:
   Member<LocalFrame> m_frame;
 };
 
 }  // namespace blink
 
 #endif  // LocalFrame_h