compositor-worker: Introduce CompositorProxy::disconnect().

Source/core/dom/ElementRareData.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith <catfish.man@gmail.com>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 105 matching lines @@
     InputMethodContext& ensureInputMethodContext(HTMLElement* element)
     {
         if (!m_inputMethodContext)
             m_inputMethodContext = InputMethodContext::create(element);
         return *m_inputMethodContext;
     }
 
     bool hasPseudoElements() const;
     void clearPseudoElements();
 
+    uint32_t incrementProxyCount() { return ++m_proxyCount; }
+    uint32_t decrementProxyCount()
+    {
+        ASSERT(m_proxyCount);
+        return --m_proxyCount;
+    }
+    uint32_t proxyCount() const { return m_proxyCount; }
+
     void setCustomElementDefinition(PassRefPtrWillBeRawPtr<CustomElementDefinition> definition) { m_customElementDefinition = definition; }
     CustomElementDefinition* customElementDefinition() const { return m_customElementDefinition.get(); }
 
     WillBeHeapVector<RefPtrWillBeMember<Attr>>& ensureAttrNodeList();
     WillBeHeapVector<RefPtrWillBeMember<Attr>>* attrNodeList() { return m_attrNodeList.get(); }
     void removeAttrNodeList() { m_attrNodeList.clear(); }
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
     short m_tabindex;
-    bool m_tabStop;
+    unsigned short m_tabStop : 1;
+    unsigned short m_proxyCount : 10;
 
     LayoutSize m_minimumSizeForResizing;
     IntSize m_savedLayerScrollOffset;
 
     OwnPtrWillBeMember<DatasetDOMStringMap> m_dataset;
     OwnPtrWillBeMember<ClassList> m_classList;
     OwnPtrWillBeMember<ElementShadow> m_shadow;
     OwnPtrWillBeMember<NamedNodeMap> m_attributeMap;
     OwnPtrWillBeMember<WillBeHeapVector<RefPtrWillBeMember<Attr>>> m_attrNodeList;
     OwnPtrWillBeMember<InputMethodContext> m_inputMethodContext;
@@ skipping 13 matching lines @@
 
 inline LayoutSize defaultMinimumSizeForResizing()
 {
     return LayoutSize(LayoutUnit::max(), LayoutUnit::max());
 }
 
 inline ElementRareData::ElementRareData(LayoutObject* renderer)
     : NodeRareData(renderer)
     , m_tabindex(0)
     , m_tabStop(true)
+    , m_proxyCount(0)
     , m_minimumSizeForResizing(defaultMinimumSizeForResizing())
 {
     m_isElementRareData = true;
 }
 
 inline ElementRareData::~ElementRareData()
 {
 #if !ENABLE(OILPAN)
     ASSERT(!m_shadow);
 #endif
@@ skipping 56 matching lines @@
     case FIRST_LETTER:
         return m_generatedFirstLetter.get();
     default:
         return 0;
     }
 }
 
 } // namespace
 
 #endif // ElementRareData_h