Track connected subframes per-Document instead of per-Node.

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,
@@ skipping 63 matching lines @@
     }
 
     NodeMutationObserverData* mutationObserverData() { return m_mutationObserverData.get(); }
     NodeMutationObserverData& ensureMutationObserverData()
     {
         if (!m_mutationObserverData)
             m_mutationObserverData = NodeMutationObserverData::create();
         return *m_mutationObserverData;
     }
 
-    unsigned connectedSubframeCount() const { return m_connectedFrameCount; }
-    void incrementConnectedSubframeCount(unsigned amount);
-    void decrementConnectedSubframeCount(unsigned amount)
-    {
-        ASSERT(m_connectedFrameCount);
-        ASSERT(amount <= m_connectedFrameCount);
-        m_connectedFrameCount -= amount;
-    }
-
     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; }
 
-    enum {
-        ConnectedFrameCountBits = 10, // Must fit Page::maxNumberOfFrames.
-    };
-
     DECLARE_TRACE();
 
     DECLARE_TRACE_AFTER_DISPATCH();
     void finalizeGarbageCollectedObject();
 
 protected:
     explicit NodeRareData(LayoutObject* layoutObject)
         : NodeRareDataBase(layoutObject)
-        , m_connectedFrameCount(0)
         , m_elementFlags(0)
         , m_restyleFlags(0)
         , m_isElementRareData(false)
     { }
 
 private:
     OwnPtrWillBeMember<NodeListsNodeData> m_nodeLists;
     OwnPtrWillBeMember<NodeMutationObserverData> m_mutationObserverData;
 
-    unsigned m_connectedFrameCount : ConnectedFrameCountBits;
     unsigned m_elementFlags : NumberOfElementFlags;
     unsigned m_restyleFlags : NumberOfDynamicRestyleFlags;
 protected:
     unsigned m_isElementRareData : 1;
 };
 
 } // namespace blink
 
 #endif // NodeRareData_h