Remove ElementFlags system.

sky/engine/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 25 matching lines @@
 class ElementRareData : public NodeRareData {
 public:
     static ElementRareData* create(RenderObject* renderer)
     {
         return new ElementRareData(renderer);
     }
 
     ~ElementRareData();
 
     short tabIndex() const { return m_tabindex; }
+    bool hasTabIndex() const { return m_hasTabIndex; }
 
-    void setTabIndexExplicitly(short index)
+    void setTabIndex(short index)
     {
         m_tabindex = index;
-        setElementFlag(TabIndexWasSetExplicitly, true);
+        m_hasTabIndex = true;
     }
 
-    void clearTabIndexExplicitly()
+    void clearTabIndex()
     {
         m_tabindex = 0;
-        clearElementFlag(TabIndexWasSetExplicitly);
+        m_hasTabIndex = false;
     }
 
     CSSStyleDeclaration& ensureInlineCSSStyleDeclaration(Element* ownerElement);
 
     void clearShadow() { m_shadow = nullptr; }
     ElementShadow* shadow() const { return m_shadow.get(); }
     ElementShadow& ensureShadow()
     {
         if (!m_shadow)
             m_shadow = ElementShadow::create();
@@ skipping 10 matching lines @@
     IntSize savedLayerScrollOffset() const { return m_savedLayerScrollOffset; }
     void setSavedLayerScrollOffset(IntSize size) { m_savedLayerScrollOffset = size; }
 
     ActiveAnimations* activeAnimations() { return m_activeAnimations.get(); }
     void setActiveAnimations(PassOwnPtr<ActiveAnimations> activeAnimations)
     {
         m_activeAnimations = activeAnimations;
     }
 
 private:
-    short m_tabindex;
+    unsigned m_tabindex : 16;
+    unsigned m_hasTabIndex : 1;
 
     IntSize m_savedLayerScrollOffset;
 
     OwnPtr<DOMTokenList> m_classList;
     OwnPtr<ElementShadow> m_shadow;
     OwnPtr<ActiveAnimations> m_activeAnimations;
     OwnPtr<InlineCSSStyleDeclaration> m_cssomWrapper;
 
     RefPtr<RenderStyle> m_computedStyle;
 
     explicit ElementRareData(RenderObject*);
 };
 
 inline ElementRareData::ElementRareData(RenderObject* renderer)
     : NodeRareData(renderer)
     , m_tabindex(0)
+    , m_hasTabIndex(false)
 {
     m_isElementRareData = true;
 }
 
 inline ElementRareData::~ElementRareData()
 {
 #if !ENABLE(OILPAN)
     ASSERT(!m_shadow);
 #endif
 }
 
 } // namespace
 
 #endif  // SKY_ENGINE_CORE_DOM_ELEMENTRAREDATA_H_