Compile several targets in Gallery in gyp v2.

ui/file_manager/gallery/js/compiled_resources.gyp

 # 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.
 {
   'targets': [
     {
       'target_name': 'background',
       'variables': {
         'depends': [
           '../../../../third_party/jstemplate/compiled_resources.gyp:jstemplate',
@@ skipping 106 matching lines @@
           '../../file_manager/foreground/js/metadata/thumbnail_model.js',
           '../../file_manager/foreground/js/share_client.js',
           '../../file_manager/foreground/js/thumbnail_loader.js',
           '../../file_manager/foreground/js/ui/file_manager_dialog_base.js',
           '../../file_manager/foreground/js/ui/files_alert_dialog.js',
           '../../file_manager/foreground/js/ui/files_confirm_dialog.js',
           '../../file_manager/foreground/js/ui/share_dialog.js',
           '../../file_manager/foreground/js/volume_manager_wrapper.js',
           '../../image_loader/image_loader_client.js',
           './image_editor/image_util.js',
+          './image_editor/image_loader.js',
           './image_editor/viewport.js',
           './image_editor/image_buffer.js',
           './image_editor/image_view.js',
           './image_editor/commands.js',
           './image_editor/image_editor.js',
           './image_editor/image_transform.js',
           './image_editor/image_adjust.js',
           './image_editor/image_resize.js',
           './image_editor/filter.js',
           './image_editor/image_encoder.js',
@@ skipping 30 matching lines @@
           '../../externs/volume_manager.js',
           '../../externs/webview_tag.js',
         ],
       },
       'includes': [
         '../../compile_js.gypi',
       ],
     }
   ],
 }