Fix exception reading image metadata from gdata.

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 2648 matching lines @@
   FileManager.prototype.getThumbnailURL = function(entry, callback) {
     if (!entry)
       return;
 
     var iconType = this.getIconType(entry);
 
     function returnStockIcon() {
       callback(iconType, FileType.getPreviewArt(iconType));
     }
 
+    if (DirectoryModel.getRootType(entry.fullPath) ==

[dgozman, 2012/02/29 11:35:18]

Maybe, introduce new MetadataProvider?

[SeRya, 2012/02/29 14:17:05]

Let's keep it as simple as possible on this stage. We will add appropriate code
for retrieve real metadata when API get ready.

+        DirectoryModel.RootType.GDATA) {
+      // TODO(serya): retrieve thumbnail URL with getGDataFileProperties
+      // (see http://crosbug/27030)
+      returnStockIcon();
+      return;
+    }
+
     this.metadataProvider_.fetch(entry.toURL(), function (metadata) {
       if (metadata.thumbnailURL) {
         callback(iconType, metadata.thumbnailURL, metadata.thumbnailTransform);
       } else if (iconType == 'image') {
         cacheEntrySize(entry, function() {
           if (FileType.canUseImageUrlForPreview(metadata, entry.cachedSize_)) {
             callback(iconType, entry.toURL(), metadata.imageTransform);
           } else {
             returnStockIcon();
           }
@@ skipping 1171 matching lines @@
           });
       }, onError);
 
       function onError(err) {
         console.log('Error while checking free space: ' + err);
         setTimeout(doCheck, 1000 * 60);
       }
     }
   }
 })();