Merge 120868

Source/WebCore/dom/Document.cpp

Index: Source/WebCore/dom/Document.cpp
===================================================================
--- Source/WebCore/dom/Document.cpp	(revision 122244)
+++ Source/WebCore/dom/Document.cpp	(working copy)
@@ -3864,16 +3864,21 @@
 
 void Document::registerDynamicSubtreeNodeList(DynamicSubtreeNodeList* list)
 {
-    ensureRareData()->ensureNodeLists(this)->m_listsInvalidatedAtDocument.add(list);
+    m_listsInvalidatedAtDocument.add(list);
 }
 
 void Document::unregisterDynamicSubtreeNodeList(DynamicSubtreeNodeList* list)
 {
-    ASSERT(hasRareData());
-    ASSERT(rareData()->nodeLists());
-    rareData()->nodeLists()->m_listsInvalidatedAtDocument.remove(list);
+    m_listsInvalidatedAtDocument.remove(list);
 }
 
+void Document::clearNodeListCaches()
+{
+    HashSet<DynamicSubtreeNodeList*>::iterator end = m_listsInvalidatedAtDocument.end();
+    for (HashSet<DynamicSubtreeNodeList*>::iterator it = m_listsInvalidatedAtDocument.begin(); it != end; ++it)
+        (*it)->invalidateCache();
+}
+
 void Document::attachNodeIterator(NodeIterator* ni)
 {
     m_nodeIterators.add(ni);