Introduce infrastructure for tracing ScriptWrappables.

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

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "core/dom/NodeRareData.h"
 
+#include "bindings/core/v8/ScriptWrappableVisitor.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementRareData.h"
 #include "core/frame/FrameHost.h"
 #include "core/layout/LayoutObject.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 struct SameSizeAsNodeRareData {
     void* m_pointer;
@@ skipping 14 matching lines @@
 }
 
 DEFINE_TRACE(NodeRareData)
 {
     if (m_isElementRareData)
         static_cast<ElementRareData*>(this)->traceAfterDispatch(visitor);
     else
         traceAfterDispatch(visitor);
 }
 
+DEFINE_TRACE_WRAPPERS(NodeRareData)
+{
+}
+
 void NodeRareData::finalizeGarbageCollectedObject()
 {
     RELEASE_ASSERT(!layoutObject());
     if (m_isElementRareData)
         static_cast<ElementRareData*>(this)->~ElementRareData();
     else
         this->~NodeRareData();
 }
 
 void NodeRareData::incrementConnectedSubframeCount()
 {
     SECURITY_CHECK((m_connectedFrameCount + 1) <= FrameHost::maxNumberOfFrames);
     ++m_connectedFrameCount;
 }
 
 // Ensure the 10 bits reserved for the m_connectedFrameCount cannot overflow
 static_assert(FrameHost::maxNumberOfFrames < (1 << NodeRareData::ConnectedFrameCountBits), "Frame limit should fit in rare data count");
 
 } // namespace blink