title: rel=preload for stylesheet isn't applying the styles once downloaded
body: <p>I'm trying out <code>rel=preload</code> for the first time, using it for a couple of stylesheets. Here is the code in question:</p>
  
  <pre><code>&lt;link rel="preload" href="css/styles.css" as="style"&gt;
  &lt;link rel="preload" href="//allyoucan.cloud/cdn/icofont/1.0.0beta/css/icofont.css" crossorigin="anonymous" as="style"&gt;
  </code></pre>
  
  <p>I'm testing in Chrome 61, and I can see that the stylesheets are downloaded as expected, however they're never actually applied, and I get the message on the console saying that a preloaded resource isn't being used.</p>
  
  <p>If I remove the <code>rel=preload</code> in favour of just <code>rel=stylesheet</code>, then it works perfectly fine.</p>
  
  <p>Is there something I'm missing?</p>