void RenderFrameHostImpl::ExecuteJavaScript(
     const base::string16& javascript,
     const JavaScriptResultCallback& callback) {
  static int next_id = 1;
  int key = next_id++;
  Send(new FrameMsg_JavaScriptExecuteRequest(routing_id_,
                                             javascript,
                                             key, true));
  javascript_callbacks_.insert(std::make_pair(key, callback));
}

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