ExitReflowLock(PR_TRUE);
DidCauseReflow();
PresShell::ContentChanged(nsIDocument *aDocument,                          nsIContent*  aContent,                          nsISupports* aSubContent){  EnterReflowLock();  nsresult rv = mStyleSet->ContentChanged(mPresContext, aContent, aSubContent);  VERIFY_STYLE_TREE;  ExitReflowLock(PR_TRUE);  return rv;}