const nsPIDOMWindow *win = GetCurrentInnerWindow();
const nsPIDOMWindow *win;
  PRBool HasMutationListeners(PRUint32 aMutationEventType) const  {    const nsPIDOMWindow *win = GetCurrentInnerWindow();    if (!win) {      win = this;    }    return (win->mMutationBits & aMutationEventType) != 0;  }