ExitReflowLock(PR_TRUE);
DidCauseReflow();
PresShell::ContentReplaced(nsIDocument* aDocument,                           nsIContent*  aContainer,                           nsIContent*  aOldChild,                           nsIContent*  aNewChild,                           PRInt32      aIndexInContainer){  EnterReflowLock();  nsresult  rv = mStyleSet->ContentReplaced(mPresContext, aContainer, aOldChild,                                            aNewChild, aIndexInContainer);  VERIFY_STYLE_TREE;  ExitReflowLock(PR_TRUE);  return rv;}