mCurrentEventContent->GetDocument(*getter_AddRefs(doc));
mCurrentEventContent->GetDocument(getter_AddRefs(doc));
PRBool PresShell::InZombieDocument(nsIContent *aContent){  // If a content node points to a null document, it is possibly in a  // zombie document, about to be replaced by a newly loading document.  // Such documents cannot handle DOM events.  // It might actually be in a node not attached to any document,  // in which case there is not parent presshell to retarget it to.  nsCOMPtr<nsIDocument> doc;  mCurrentEventContent->GetDocument(*getter_AddRefs(doc));  return !doc;}