Allows menu host windows to be enumerated in DragTargetWindowFinder

ui/base/ui_base.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 310 matching lines @@
         'x/root_window_property_watcher_x.cc',
         'x/root_window_property_watcher_x.h',
         'x/selection_owner.cc',
         'x/selection_owner.h',
         'x/selection_requestor.cc',
         'x/selection_requestor.h',
         'x/selection_utils.cc',
         'x/selection_utils.h',
         'x/work_area_watcher_x.cc',
         'x/work_area_watcher_x.h',
+        'x/x11_menu_list.cc',
+        'x/x11_menu_list.h',
         'x/x11_util.cc',
         'x/x11_util.h',
         'x/x11_util_internal.h',
       ],
       'target_conditions': [
         ['OS == "ios"', {
           'sources/': [
             ['include', '^l10n/l10n_util_mac\\.mm$'],
           ],
         }],
@@ skipping 280 matching lines @@
            'variables': {
              'jni_gen_package': 'ui',
              'jni_generator_ptr_type': 'long',
            },
            'includes': [ '../../build/jni_generator.gypi' ],
          },
        ],
     }],
   ],
 }