title: .setCapture and .releaseCapture in Chrome
body: <p>I have an HTML5 canvas based Javascript component that needs to capture and release mouse events.  In the control the user clicks an area inside it and drags to affect a change.  On PC I would like the user to be able to continue dragging outside of the browser and for the canvas to receive the mouse up event if the button is released outside of the window.</p>
  
  <p>However, according to my reading setCapture and releaseCapture aren't supported on Chrome.  </p>
  
  <p>Is there a workaround?</p>