Describe the problem: 

Currently, all graphs have revision numbers on the X-axis. This is not as straight forward to use when correlating data from multiple sources. Please add the ability to see dates directly on the X-axis (right now, we can only see them by hovering over a particular point)

URL: https://v2spa-dot-chromeperf.appspot.com#session=9d0105341f7c50390cec527a2abf8fc19767633d6e05f9d82cbc8f9694d223f8