title: How to ask for more quota persistent space via javascript on chrome?
body: <p>I am using below code to request more <code>Quota</code> space in chrome:</p>
  
  <pre><code>navigator.webkitPersistentStorage.requestQuota (
      requestedBytes, function(grantedBytes) {
          window.requestFileSystem(PERSISTENT, grantedBytes, onInitFs, errorHandler);
  
      }, function(e) { console.log('Error', e); }
  );
  </code></pre>
  
  <p>but got this error:</p>
  
  <pre><code>VM4144:3 Uncaught ReferenceError: onInitFs is not defined
      at &lt;anonymous&gt;:3:60
  </code></pre>
  
  <p>Does anyone know how I can request more quota?</p>