Reorder browser list on workspace switch

ui/display/display.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 54 matching lines @@
         'chromeos/x11/display_mode_x11.cc',
         'chromeos/x11/display_mode_x11.h',
         'chromeos/x11/display_snapshot_x11.cc',
         'chromeos/x11/display_snapshot_x11.h',
         'chromeos/x11/display_util_x11.cc',
         'chromeos/x11/display_util_x11.h',
         'chromeos/x11/native_display_delegate_x11.cc',
         'chromeos/x11/native_display_delegate_x11.h',
         'chromeos/x11/native_display_event_dispatcher_x11.cc',
         'chromeos/x11/native_display_event_dispatcher_x11.h',
+        'desktop_observer.h',
+        'desktop_observer.cc',
         'display.cc',
         'display.h',
         'display_change_notifier.cc',
         'display_change_notifier.h',
         'display_export.h',
         'display_finder.cc',
         'display_finder.h',
         'display_observer.cc',
         'display_observer.h',
         'display_switches.cc',
@@ skipping 200 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             'display_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }