Makes MouseWatcher work while in metro mode

ui/views/views.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
   },
   'target_defaults': {
     'conditions': [
       ['use_aura==1', {
@@ skipping 361 matching lines @@
         'widget/desktop_aura/desktop_cursor_loader_updater_auralinux.h',
         'widget/desktop_aura/desktop_cursor_loader_updater_aurawin.cc',
         'widget/desktop_aura/desktop_dispatcher_client.cc',
         'widget/desktop_aura/desktop_dispatcher_client.h',
         'widget/desktop_aura/desktop_drag_drop_client_aurax11.cc',
         'widget/desktop_aura/desktop_drag_drop_client_aurax11.h',
         'widget/desktop_aura/desktop_drag_drop_client_win.cc',
         'widget/desktop_aura/desktop_drag_drop_client_win.h',
         'widget/desktop_aura/desktop_drop_target_win.cc',
         'widget/desktop_aura/desktop_drop_target_win.h',
+        'widget/desktop_aura/desktop_event_client.cc',
+        'widget/desktop_aura/desktop_event_client.h',
         'widget/desktop_aura/desktop_factory_ozone.cc',
         'widget/desktop_aura/desktop_factory_ozone.h',
         'widget/desktop_aura/desktop_focus_rules.cc',
         'widget/desktop_aura/desktop_focus_rules.h',
         'widget/desktop_aura/desktop_native_cursor_manager.cc',
         'widget/desktop_aura/desktop_native_cursor_manager.h',
         'widget/desktop_aura/desktop_native_widget_aura.cc',
         'widget/desktop_aura/desktop_native_widget_aura.h',
         'widget/desktop_aura/desktop_root_window_host.h',
         'widget/desktop_aura/desktop_root_window_host_ozone.cc',
@@ skipping 712 matching lines @@
           'sources/': [
             # This is needed because the aura rule strips it from the default
             # sources list.
             ['include', '^../../content/app/startup_helper_win.cc'],
           ],
         }],
       ],
     },  # target_name: views_examples_with_content_exe
   ],
 }