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

ui/file_manager/gallery/js/image_editor/image_view_unittest.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.
 
 function testImageView() {
-  assertTrue(!!ImageView);
+  var mockFileSystem = new MockFileSystem('volumeId');
+  var mockEntry = new MockEntry(mockFileSystem, '/test.jpg');
 
   // Item has full size cache.
-  var itemWithFullCache = new Gallery.Item(null, null, {}, null, false);
+  var itemWithFullCache = new Gallery.Item(mockEntry, null, {}, null, false);
   itemWithFullCache.contentImage = document.createElement('canvas');
   assertEquals(
       ImageView.LoadTarget.CACHED_MAIN_IMAGE,
       ImageView.getLoadTarget(itemWithFullCache, new ImageView.Effect.None()));
 
   // Item has screen size cache.
-  var itemWithScreenCache = new Gallery.Item(null, null, {}, null, false);
+  var itemWithScreenCache = new Gallery.Item(mockEntry, null, {}, null, false);
   itemWithScreenCache.screenImage = document.createElement('canvas');
   assertEquals(
       ImageView.LoadTarget.CACHED_THUMBNAIL,
       ImageView.getLoadTarget(
           itemWithScreenCache, new ImageView.Effect.None()));
 
   // Item with content thumbnail.
   var itemWithContentThumbnail = new Gallery.Item(
-      null, null, {thumbnail: {url: 'url'}}, null, false);
+      mockEntry, null, {thumbnail: {url: 'url'}}, null, false);
   assertEquals(
       ImageView.LoadTarget.THUMBNAIL,
       ImageView.getLoadTarget(
           itemWithContentThumbnail, new ImageView.Effect.None()));
 
   // Item with external thumbnail.
   var itemWithExternalThumbnail = new Gallery.Item(
-      null, null, {external: {thumbnailUrl: 'url'}}, null, false);
+      mockEntry, null, {external: {thumbnailUrl: 'url'}}, null, false);
   assertEquals(
       ImageView.LoadTarget.THUMBNAIL,
       ImageView.getLoadTarget(
           itemWithExternalThumbnail, new ImageView.Effect.None()));
 
+  // Item with external thumbnail but present localy.
+  var itemWithExternalThumbnailPresent = new Gallery.Item(
+      mockEntry, null, {external: {thumbnailUrl: 'url', dirty: true}}, null,
+      false);
+  assertEquals(
+      ImageView.LoadTarget.MAIN_IMAGE,
+      ImageView.getLoadTarget(
+          itemWithExternalThumbnailPresent, new ImageView.Effect.None()));
+
   // Item with external thumbnail shown by slide effect.
   var itemWithExternalThumbnailSlide = new Gallery.Item(
-      null, null, {external: {thumbnailUrl: 'url'}}, null, false);
+      mockEntry, null, {external: {thumbnailUrl: 'url'}}, null, false);
   assertEquals(
       ImageView.LoadTarget.THUMBNAIL,
       ImageView.getLoadTarget(
           itemWithExternalThumbnailSlide, new ImageView.Effect.Slide(1)));
 
   // Item with external thumbnail shown by zoom effect.
   var itemWithExternalThumbnailZoom = new Gallery.Item(
-      null, null, {external: {thumbnailUrl: 'url'}}, null, false);
+      mockEntry, null, {external: {thumbnailUrl: 'url'}}, null, false);
   assertEquals(
       ImageView.LoadTarget.MAIN_IMAGE,
       ImageView.getLoadTarget(
           itemWithExternalThumbnailZoom,
           new ImageView.Effect.Zoom(0, 0, null)));
 
   // Item without cache/thumbnail.
   var itemWithoutCacheOrThumbnail = new Gallery.Item(
-      null, null, {}, null, false);
+      mockEntry, null, {}, null, false);
   assertEquals(
       ImageView.LoadTarget.MAIN_IMAGE,
       ImageView.getLoadTarget(
           itemWithoutCacheOrThumbnail, new ImageView.Effect.None));
 }