Compile several targets in Gallery in gyp v2.

ui/file_manager/externs/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.
 {
   'targets': [
     {
       'target_name': 'app_window_common',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
@@ skipping 66 matching lines @@
     },
     {
       'target_name': 'files_elements',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'gallery_background',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
+      'target_name': 'gallery_event',
+      'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
+    },
+    {
       'target_name': 'gallery_foreground',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'html_menu_item_element',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'launcher_search_provider',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
@@ skipping 37 matching lines @@
     {
       'target_name': 'volume_manager',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
     {
       'target_name': 'webview_tag',
       'includes': ['../../../third_party/closure_compiler/include_js.gypi'],
     },
   ],
 }