Remove the concept of document.documentElement

sky/engine/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 51 matching lines @@
 #include "sky/engine/core/page/EventHandler.h"
 #include "sky/engine/core/page/Page.h"
 #include "sky/engine/core/rendering/style/RenderStyle.h"
 #include "sky/engine/core/script/dart_controller.h"
 #include "sky/engine/platform/EventDispatchForbiddenScope.h"
 #include "sky/engine/platform/PlatformScreen.h"
 #include "sky/engine/platform/geometry/FloatRect.h"
 #include "sky/engine/platform/weborigin/KURL.h"
 #include "sky/engine/platform/weborigin/SecurityPolicy.h"
 #include "sky/engine/public/platform/Platform.h"
+#include "sky/engine/tonic/dart_gc_visitor.h"
 #include "sky/engine/wtf/MainThread.h"
 #include "sky/engine/wtf/MathExtras.h"
 #include "sky/engine/wtf/text/WTFString.h"
 
 using std::min;
 using std::max;
 
 namespace blink {
 
 static void disableSuddenTermination()
@@ skipping 221 matching lines @@
 ExecutionContext* LocalDOMWindow::executionContext() const
 {
     return m_document.get();
 }
 
 LocalDOMWindow* LocalDOMWindow::toDOMWindow()
 {
     return this;
 }
 
+void LocalDOMWindow::AcceptDartGCVisitor(DartGCVisitor& visitor) const {
+    visitor.AddToSetForRoot(document(), dart_wrapper());
+    EventTarget::AcceptDartGCVisitor(visitor);
+}
+
 PassRefPtr<MediaQueryList> LocalDOMWindow::matchMedia(const String& media)
 {
     return document() ? document()->mediaQueryMatcher().matchMedia(media) : nullptr;
 }
 
 Page* LocalDOMWindow::page()
 {
     return frame() ? frame()->page() : 0;
 }
 
@@ skipping 380 matching lines @@
 {
     return static_cast<DOMWindowLifecycleNotifier&>(LifecycleContext<LocalDOMWindow>::lifecycleNotifier());
 }
 
 PassOwnPtr<LifecycleNotifier<LocalDOMWindow> > LocalDOMWindow::createLifecycleNotifier()
 {
     return DOMWindowLifecycleNotifier::create(this);
 }
 
 } // namespace blink