Files.app: Stop to use drive thumbnail for cached files.

ui/file_manager/gallery/js/image_editor/image_view.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.
 
 /**
  * The overlay displaying the image.
  *
  * @param {!HTMLElement} container The container element.
  * @param {!Viewport} viewport The viewport.
  * @constructor
@@ skipping 132 matching lines @@
  * @return {ImageView.LoadTarget} Load target.
  */
 ImageView.getLoadTarget = function(item, effect) {
   if (item.contentImage)
     return ImageView.LoadTarget.CACHED_MAIN_IMAGE;
   if (item.screenImage)
     return ImageView.LoadTarget.CACHED_THUMBNAIL;
 
   // Only show thumbnails if there is no effect or the effect is Slide.
   var metadata = item.getMetadata();
+  var thumbnailLoader = new ThumbnailLoader(
+      item.getEntry(), ThumbnailLoader.LoaderType.CANVAS, item.getMetadata());
   if ((effect instanceof ImageView.Effect.None ||
        effect instanceof ImageView.Effect.Slide) &&
-      ThumbnailLoader.hasThumbnailInMetadata(metadata)) {
+      thumbnailLoader.getLoadTarget() !==
+      ThumbnailLoader.LoadTarget.FILE_ENTRY) {
     return ImageView.LoadTarget.THUMBNAIL;
   }
 
   return ImageView.LoadTarget.MAIN_IMAGE;
 };
 
 ImageView.prototype = {__proto__: ImageBuffer.Overlay.prototype};
 
 /**
  * @override
@@ skipping 805 matching lines @@
 };
 
 ImageView.Effect.Rotate.prototype = { __proto__: ImageView.Effect.prototype };
 
 /**
  * @override
  */
 ImageView.Effect.Rotate.prototype.transform = function(element, viewport) {
   return viewport.getInverseTransformForRotatedImage(this.orientation_);
 };