Storage of ComputedStyle separate from LayoutObject.

third_party/WebKit/Source/core/dom/NodeRareData.h

 /*
  * Copyright (C) 2008, 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef NodeRareData_h
 #define NodeRareData_h
 
 #include "core/dom/MutationObserverRegistration.h"
 #include "core/dom/NodeListsNodeData.h"
+#include "core/style/ComputedStyle.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class NodeMutationObserverData final : public GarbageCollected<NodeMutationObserverData> {
     WTF_MAKE_NONCOPYABLE(NodeMutationObserverData);
 public:
@@ skipping 60 matching lines @@
 
     bool hasElementFlag(ElementFlags mask) const { return m_elementFlags & mask; }
     void setElementFlag(ElementFlags mask, bool value) { m_elementFlags = (m_elementFlags & ~mask) | (-(int32_t)value & mask); }
     void clearElementFlag(ElementFlags mask) { m_elementFlags &= ~mask; }
 
     bool hasRestyleFlag(DynamicRestyleFlags mask) const { return m_restyleFlags & mask; }
     void setRestyleFlag(DynamicRestyleFlags mask) { m_restyleFlags |= mask; RELEASE_ASSERT(m_restyleFlags); }
     bool hasRestyleFlags() const { return m_restyleFlags; }
     void clearRestyleFlags() { m_restyleFlags = 0; }
 
+    CORE_EXPORT ComputedStyle* computedStyle() const;
+    void setComputedStyle(PassRefPtr<ComputedStyle>);
+
     enum {
         ConnectedFrameCountBits = 10, // Must fit Page::maxNumberOfFrames.
     };
 
     DECLARE_TRACE();
 
     DECLARE_TRACE_AFTER_DISPATCH();
     void finalizeGarbageCollectedObject();
 
     DECLARE_TRACE_WRAPPERS();
     DECLARE_TRACE_WRAPPERS_AFTER_DISPATCH();
 
 protected:
     explicit NodeRareData(LayoutObject* layoutObject)
         : NodeRareDataBase(layoutObject)
+        , m_computedStyle(nullptr)
         , m_connectedFrameCount(0)
         , m_elementFlags(0)
         , m_restyleFlags(0)
         , m_isElementRareData(false)
     { }
 
 private:
     Member<NodeListsNodeData> m_nodeLists;
     Member<NodeMutationObserverData> m_mutationObserverData;
+    RefPtr<ComputedStyle> m_computedStyle;
 
     unsigned m_connectedFrameCount : ConnectedFrameCountBits;
     unsigned m_elementFlags : NumberOfElementFlags;
     unsigned m_restyleFlags : NumberOfDynamicRestyleFlags;
 protected:
     unsigned m_isElementRareData : 1;
 };
 
 } // namespace blink
 
 #endif // NodeRareData_h