A surprise partnership bodes well for the Chinese search leader.Shares of Baidu (BIDU 9.42%) charged sharply higher on Tuesday, surging as much as 9%. As of 12:46 p.m. ET, the stock was still up 8.5%.The catalyst that sent the Chinese tech giant higher was a high-profile partnership for its self-driving car platform. A foot in the door of a worldwide marketIn a joint press release, Baidu revealed that it had joined forces with Uber (UBER -1.48%) to accelerate the deployment of autonomous vehicles worldwide. ...