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

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

Index: third_party/WebKit/Source/core/dom/NodeRareData.h
diff --git a/third_party/WebKit/Source/core/dom/NodeRareData.h b/third_party/WebKit/Source/core/dom/NodeRareData.h
index 4621a0c231360d0df485c54d70078bee5badff2a..673ff33571a8244307d9daff609f9b4a406e34a2 100644
--- a/third_party/WebKit/Source/core/dom/NodeRareData.h
+++ b/third_party/WebKit/Source/core/dom/NodeRareData.h
@@ -81,15 +81,6 @@ public:
         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; }
@@ -99,10 +90,6 @@ public:
     bool hasRestyleFlags() const { return m_restyleFlags; }
     void clearRestyleFlags() { m_restyleFlags = 0; }
 
-    enum {
-        ConnectedFrameCountBits = 10, // Must fit Page::maxNumberOfFrames.
-    };
-
     DECLARE_TRACE();
 
     DECLARE_TRACE_AFTER_DISPATCH();
@@ -111,7 +98,6 @@ public:
 protected:
     explicit NodeRareData(LayoutObject* layoutObject)
         : NodeRareDataBase(layoutObject)
-        , m_connectedFrameCount(0)
         , m_elementFlags(0)
         , m_restyleFlags(0)
         , m_isElementRareData(false)
@@ -121,7 +107,6 @@ private:
     OwnPtrWillBeMember<NodeListsNodeData> m_nodeLists;
     OwnPtrWillBeMember<NodeMutationObserverData> m_mutationObserverData;
 
-    unsigned m_connectedFrameCount : ConnectedFrameCountBits;
     unsigned m_elementFlags : NumberOfElementFlags;
     unsigned m_restyleFlags : NumberOfDynamicRestyleFlags;
 protected: