title: ImageData data assignment in Strict Mode
body: <p>Let's say I have such PoC code snippet for working with <code>canvas</code> raw pixel data</p>
  
  <pre><code>(function(){
    'use strict';
    var img = document.createElement("canvas").getContext("2d").getImageData(0, 0, 1, 1);
    var imgData = img.data;
    img.data = imgData;
  })();
  </code></pre>
  
  <p>The problem is that I get a reasonable error (I've checked in the latest Chrome and FF)</p>
  
  <pre><code>TypeError: Cannot assign to read only property 'data' of #&lt;ImageData&gt;
  </code></pre>
  
  <p>So, I can disable Strict Mode and everything will become perfect, but is there any possibility to implement this in Strict Mode? Maybe i just didn't find a documentation on setter for <code>data</code>?</p>
  
  <p>Thanks!</p>