Introduce ExecutionContextClient

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 444 matching lines @@
     , m_scheduledTasksAreSuspended(false)
     , m_sharedObjectPoolClearTimer(this, &Document::sharedObjectPoolClearTimerFired)
 #ifndef NDEBUG
     , m_didDispatchViewportPropertiesChanged(false)
 #endif
     , m_timeline(DocumentTimeline::create(this))
     , m_templateDocumentHost(0)
     , m_fonts(0)
     , m_didAssociateFormControlsTimer(this, &Document::didAssociateFormControlsTimerFired)
 {
+    setClient(this);
     ScriptWrappable::init(this);
 
     if (m_frame) {
         provideContextFeaturesToDocumentFrom(this, m_frame->page());
 
         m_fetcher = m_frame->loader()->activeDocumentLoader()->fetcher();
     }
 
     if (!m_fetcher)
         m_fetcher = ResourceFetcher::create(0);
@@ skipping 85 matching lines @@
     // as well as Node. See a comment on TreeScope.h for the reason.
     if (hasRareData())
         clearRareData();
 
     ASSERT(!m_listsInvalidatedAtDocument.size());
 
     for (unsigned i = 0; i < WTF_ARRAY_LENGTH(m_nodeListCounts); i++)
         ASSERT(!m_nodeListCounts[i]);
 
     clearDocumentScope();
+    setClient(0);
 
     InspectorCounters::decrementCounter(InspectorCounters::DocumentCounter);
 }
 
 void Document::dispose()
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!m_deletionHasBegun);
     // We must make sure not to be retaining any of our children through
     // these extra pointers or we will create a reference cycle.
     m_docType = 0;
@@ skipping 4694 matching lines @@
 {
     return DocumentLifecycleNotifier::create(this);
 }
 
 DocumentLifecycleNotifier* Document::lifecycleNotifier()
 {
     return static_cast<DocumentLifecycleNotifier*>(ExecutionContext::lifecycleNotifier());
 }
 
 } // namespace WebCore