Implementing full screen mode for video player in Chrome OS File Browser.

chrome/browser/resources/file_manager/js/file_manager.js

 // Copyright (c) 2012 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.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 const EMPTY_IMAGE_URI = 'data:image/gif;base64,'
         + 'R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw%3D%3D';
 
 /**
@@ skipping 2236 matching lines @@
     }
     return undefined;
   };
 
   FileManager.prototype.openGallery_ = function(urls, shareActions, type) {
     var self = this;
 
     var galleryFrame = this.document_.createElement('iframe');
     galleryFrame.className = 'overlay-pane';
     galleryFrame.scrolling = 'no';
+    galleryFrame.setAttribute('webkitallowfullscreen', true);
 
     var selectedUrl;
     if (urls.length == 1) {
       // Single item selected. Pass to the Gallery as a selected.
       selectedUrl = urls[0];
       // Pass every image in the directory so that it shows up in the ribbon.
       urls = [];
       var dm = this.directoryModel_.fileList;
       for (var i = 0; i != dm.length; i++) {
         var entry = dm.item(i);
@@ skipping 1358 matching lines @@
           });
       }, onError);
 
       function onError(err) {
         console.log('Error while checking free space: ' + err);
         setTimeout(doCheck, 1000 * 60);
       }
     }
   }
 })();