Run jshint over all JavaScript files

ports/snes9x/snes9x.js

 /*
  * Copyright (c) 2013 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+'use strict';
+
 function domContentLoaded() {
   document.getElementById('romfile').addEventListener(
       'change', handleFileSelect, false);
 }
 
 function handleFileSelect(evt) {
   var file = evt.target.files[0];
   var reader = new FileReader();
   var result = null;
 
   console.log('reader.readAsArrayBuffer');
-  reader.onloadend = onReadSuccess;
+  reader.onloadend = onLoadEnd;
   reader.onerror = errorHandler;
   reader.readAsArrayBuffer(file);
 
-  function onReadSuccess() {
-    result = this.result;
-
+  function onLoadEnd(evt) {
     console.log('window.webkitRequestFileSystem');
     window.webkitRequestFileSystem(
-        window.TEMPORARY, result.size, onRequestQuotaSuccess, errorHandler);
+        window.TEMPORARY, evt.result.size, onRequestQuotaSuccess, errorHandler);
   }
 
   function onRequestQuotaSuccess(fs) {
     console.log('fs.root.getFile');
     fs.root.getFile(file.name, {create: true}, onGetFileSuccess, errorHandler);
   }
 
   function onGetFileSuccess(fileEntry) {
     console.log('fileEntry.createWriter');
     fileEntry.createWriter(onCreateWriterSuccess, errorHandler);
@@ skipping 31 matching lines @@
   nacl.setAttribute('ARG0',  'snes9x');
   nacl.setAttribute('ARG1',  filename);
   nacl.setAttribute('ARG2',  '-v1');  // Use "blocky" image scaling.
 
   // Remove previous embed element.
   document.getElementById('listener').innerHTML = '';
   document.getElementById('listener').appendChild(nacl);
 }
 
 document.addEventListener('DOMContentLoaded', domContentLoaded);