Refactor the Photo Editor to enable new feature work

chrome/browser/resources/file_manager/js/image_editor/gallery_scripts.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.
-
-// The include directives are put into Javascript-style comments to prevent
-// parsing errors in non-flattened mode. The flattener still sees them.
-// Note that this makes the flattener to comment out the first line of the
-// included file but that's all right since any javascript file should start
-// with a copyright comment anyway.
-
-//<include src="image_util.js"/>
-//<include src="viewport.js"/>
-//<include src="image_buffer.js"/>
-//<include src="image_view.js"/>
-//<include src="commands.js"/>
-//<include src="image_editor.js"/>
-//<include src="image_transform.js"/>
-//<include src="image_adjust.js"/>
-//<include src="filter.js"/>
-//<include src="gallery.js"/>
-//<include src="image_encoder.js"/>
-//<include src="exif_encoder.js"/>
-//<include src="../media/media_controls.js"/>
-//<include src="../media/media_util.js"/>
-//<include src="../metadata/metadata_cache.js"/>