Merge 139806

Source/WebCore/dom/Node.cpp

Index: Source/WebCore/dom/Node.cpp
===================================================================
--- Source/WebCore/dom/Node.cpp	(revision 141145)
+++ Source/WebCore/dom/Node.cpp	(working copy)
@@ -2099,6 +2099,9 @@
 {
     TreeScopeAdopter::ensureDidMoveToNewDocumentWasCalled(oldDocument);
 
+    if (AXObjectCache::accessibilityEnabled() && oldDocument && oldDocument->axObjectCacheExists())
+        oldDocument->axObjectCache()->remove(this);
+
     // FIXME: Event listener types for this node should be set on the new owner document here.
 
     const EventListenerVector& wheelListeners = getEventListeners(eventNames().mousewheelEvent);