Fixed flickering thumbnails in Files.app on Drive.

chrome/browser/resources/file_manager/js/file_grid.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.
 
 'use strict';
 
 /**
  * FileGrid constructor.
  *
  * Represents grid for the Grid Vew in the File Manager.
@@ skipping 110 matching lines @@
     // TODO(dgozman): If we ask for 'media' for a Drive file we fall into an
     // infinite loop.
     metadataTypes += '|media';
   }
 
   metadataCache.get(imageUrl, metadataTypes,
       function(metadata) {
         new ThumbnailLoader(imageUrl,
                             ThumbnailLoader.LoaderType.IMAGE,
                             metadata).
-            load(box, fillMode, opt_imageLoadCallback, onImageLoadError);
+            load(box,
+                 fillMode,
+                 ThumbnailLoader.OptimizationMode.DISCARD_DETACHED,
+                 opt_imageLoadCallback,
+                 onImageLoadError);
       });
 };
 
 /**
  * Item for the Grid View.
  * @constructor
  */
 FileGrid.Item = function() {
   throw new Error();
 };
@@ skipping 24 matching lines @@
     checkBox.classList.add('white');
     var bottom = li.querySelector('.thumbnail-bottom');
     bottom.appendChild(checkBox);
     bottom.classList.add('show-checkbox');
   }
 
   // Override the default role 'listitem' to 'option' to match the parent's
   // role (listbox).
   li.setAttribute('role', 'option');
 };