Report size of the external memory to V8 in StaticNodeList

Source/core/dom/StaticNodeList.cpp

Index: Source/core/dom/StaticNodeList.cpp
diff --git a/Source/core/dom/StaticNodeList.cpp b/Source/core/dom/StaticNodeList.cpp
index 10f4b281435a3e49384e2b664f5b2cf438cb5587..addd65dc52486dcb3329de80237d5fabab69bf07 100644
--- a/Source/core/dom/StaticNodeList.cpp
+++ b/Source/core/dom/StaticNodeList.cpp
@@ -31,8 +31,23 @@
 
 #include "core/dom/Element.h"
 
+#include <v8.h>
+
 namespace WebCore {
 
+PassRefPtr<StaticNodeList> StaticNodeList::adopt(Vector<RefPtr<Node> >& nodes)
+{
+    RefPtr<StaticNodeList> nodeList = adoptRef(new StaticNodeList);
+    nodeList->m_nodes.swap(nodes);
+    v8::V8::AdjustAmountOfExternalAllocatedMemory(nodeList->m_nodes.capacity() * sizeof(RefPtr<Node>));
+    return nodeList.release();
+}
+
+StaticNodeList::~StaticNodeList()
+{
+    v8::V8::AdjustAmountOfExternalAllocatedMemory(-static_cast<int>(m_nodes.capacity() * sizeof(RefPtr<Node>)));
+}
+
 unsigned StaticNodeList::length() const
 {
     return m_nodes.size();