void WebContents::DestroyWebContents(bool async) {
  // This event is only for internal use, which is emitted when WebContents is
  // being destroyed.
  Emit("will-destroy");
  ResetManagedWebContents(async);
}
void WebContents::DestroyWebContents(bool async) {
   
   
  Emit("will-destroy");
  ResetManagedWebContents(async);
}