Files.app: Fix closure error which will raised by the updated compiler.

ui/file_manager/gallery/js/image_editor/image_util.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Namespace object for the utilities.
 var ImageUtil = {};
 
 /**
  * Performance trace.
  */
@@ skipping 495 matching lines @@
     var emptyCanvas = assertInstanceof(this.document_.createElement('canvas'),
         HTMLCanvasElement);
     emptyCanvas.width = 0;
     emptyCanvas.height = 0;
     tmpCallback(emptyCanvas, opt_error);
   };
   onError = onError.bind(this);
 
   var loadImage = function() {
     ImageUtil.metrics.startInterval(ImageUtil.getMetricName('LoadTime'));
-    this.timeout_ = null;
+    this.timeout_ = 0;
 
     this.image_.onload = function() {
       this.image_.onerror = null;
       this.image_.onload = null;
       this.metadataModel_.get([entry], ['contentImageTransform']).then(
           function(metadataItems) {
             onTransform(this.image_, metadataItems[0].contentImageTransform);
           }.bind(this));
     }.bind(this);
 
@@ skipping 198 matching lines @@
 ImageUtil.getMetricName = function(name) {
   return 'PhotoEditor.' + name;
 };
 
 /**
  * Used for metrics reporting, keep in sync with the histogram description.
  * @type {Array.<string>}
  * @const
  */
 ImageUtil.FILE_TYPES = ['jpg', 'png', 'gif', 'bmp', 'webp'];