support animated GIF

ui/file_manager/integration_tests/gallery/open_image_files.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.
 
 'use strict';
 
 /**
  * Runs a test to open a single image.
  *
  * @param {string} testVolumeName Test volume name passed to the addEntries
@@ skipping 25 matching lines @@
                 bounds.outerHeight);
           }
           return true;
         });
       });
     });
 
     return resizedWindowPromise.then(function() {
       var rootElementPromise =
           gallery.waitForElement(appId, '.gallery[mode="slide"]');
-      var imagePromise = gallery.waitForElement(
-          appId, '.gallery .content canvas.image[width="760"]');
       var fullImagePromsie = gallery.waitForElement(
-          appId, '.gallery .content canvas.fullres[width="800"]');
-      return Promise.all([rootElementPromise, imagePromise, fullImagePromsie]).
+          appId, '.gallery .image-container > .image');
+      return Promise.all([rootElementPromise, fullImagePromsie]).
           then(function(args) {
-            chrome.test.assertEq('760', args[1].attributes.width);
-            chrome.test.assertEq('570', args[1].attributes.height);
-            chrome.test.assertEq('800', args[2].attributes.width);
-            chrome.test.assertEq('600', args[2].attributes.height);
+            chrome.test.assertEq(760, args[1].renderedWidth);
+            chrome.test.assertEq(570, args[1].renderedHeight);

[hirono, 2016/01/22 07:24:18]

Could you add assertions for imageWidth/imageHeight.

[ryoh, 2016/01/25 03:29:26]

Done.

           });
     });
   });
 }
 
 /**
  * Confirms that two images are loaded in thumbnail mode. This method doesn't
  * care whether two images are loaded with error or not.
  *
  * @param {string} appId
@@ skipping 89 matching lines @@
   return openMultipleImages('drive', 'drive');
 };
 
 /**
  * The openMultipleImagesAndChangeToSlideMode test for Downloads.
  * @return {Promise} Promise to be fulfilled with on success.
  */
 testcase.openMultipleImagesAndChangeToSlideModeOnDownloads = function() {
   return openMultipleImagesAndChangeToSlideMode('local', 'downloads');
 };