Compile more Gallery targets in gyp v2.

ui/file_manager/gallery/js/compiled_resources2.gyp

 # Copyright 2016 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.
 # TODO(oka): Compile all the targets.
 {
   'targets': [
 #    {
 #      'target_name': 'background',
 #      'includes': ['../../compile_js2.gypi'],
 #    },
     {
       'target_name': 'dimmable_ui_controller',
       'dependencies': [
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(EXTERNS_GYP):chrome_extensions',
         'gallery_constants',
+        'image_editor/compiled_resources2.gyp:image_editor_prompt',
       ],
       'includes': ['../../compile_js2.gypi'],
     },
     {
       'target_name': 'entry_list_watcher',
       'dependencies': [
         '../../externs/compiled_resources2.gyp:platform',
         '<(DEPTH)/ui/webui/resources/js/compiled_resources2.gyp:assert',
         '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:array_data_model',
         '<(EXTERNS_GYP):file_manager_private',
@@ skipping 92 matching lines @@
 #        '<(DEPTH)/ui/webui/resources/js/cr/ui/compiled_resources2.gyp:list_selection_model',
 #        'error_banner',
 #        'gallery_data_model',
 #        'gallery_item',
 #        'image_editor/compiled_resources2.gyp:image_editor',
 #      ],
 #      'includes': ['../../compile_js2.gypi'],
 #    },
   ],
 }