Add gallery tests to rotate an image.

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

 // Copyright (c) 2013 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.
 
 // Browser test for basic Chrome OS file manager functionality:
 //  - The file list is updated when a file is added externally to the Downloads
 //    folder.
 //  - Selecting a file and copy-pasting it with the keyboard copies the file.
 //  - Selecting a file and pressing delete deletes it.
 
@@ skipping 1338 matching lines @@
   set_test_case_name("deleteImageOnDownloads");
   StartTest();
 }
 
 IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, DeleteImageOnDrive) {
   AddScript("gallery/slide_mode.js");
   set_test_case_name("deleteImageOnDrive");
   StartTest();
 }
 
+IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, RotateImageOnDownloads) {
+  AddScript("gallery/photo_editor.js");
+  set_test_case_name("rotateImageOnDownloads");
+  StartTest();
+}
+
+IN_PROC_BROWSER_TEST_F(GalleryBrowserTestInGuestMode,
+                       RotateImageOnDownloads) {
+  AddScript("gallery/photo_editor.js");
+  set_test_case_name("rotateImageOnDownloads");
+  StartTest();
+}
+
+IN_PROC_BROWSER_TEST_F(GalleryBrowserTest, RotateImageOnDrive) {
+  AddScript("gallery/photo_editor.js");
+  set_test_case_name("rotateImageOnDrive");
+  StartTest();
+}
+
 }  // namespace
 }  // namespace file_manager