title: Canvas webGL context not working
body: <p>When context type is 2d its working.(<a href="http://jsfiddle.net/obk43za8/" rel="nofollow">JsFiddle</a>). But when context type is webGL(<a href="http://jsfiddle.net/obk43za8/1/" rel="nofollow">JsFiddle</a>) it is not working?</p>
  
  <pre><code>var c = document.getElementById("myCanvas");
  var ctx =c.getContext("experimental-webgl", 
               { antialias: false,
                 depth: false });
  console.log(ctx);
  ctx.fillStyle = "#FF0000";
  ctx.fillRect(0,0,150,75);
  </code></pre>