Aura/ash: On Desktops, use a aura::client to resolve screen coordinates.

ui/aura/aura.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,
   },
   'targets': [
     {
@@ skipping 24 matching lines @@
         'client/aura_constants.cc',
         'client/aura_constants.h',
         'client/dispatcher_client.cc',
         'client/dispatcher_client.h',
         'client/drag_drop_client.cc',
         'client/drag_drop_client.h',
         'client/drag_drop_delegate.cc',
         'client/drag_drop_delegate.h',
         'client/event_client.cc',
         'client/event_client.h',
+        'client/screen_position_client.cc',
+        'client/screen_position_client.h',
         'client/stacking_client.cc',
         'client/stacking_client.h',
         'client/tooltip_client.cc',
         'client/tooltip_client.h',
         'client/user_gesture_client.cc',
         'client/user_gesture_client.h',
         'client/visibility_client.cc',
         'client/visibility_client.h',
         'client/window_move_client.cc',
         'client/window_move_client.h',
@@ skipping 199 matching lines @@
         # osmesa GL implementation is used on linux.
         ['OS=="linux"', {
           'dependencies': [
             '<(DEPTH)/third_party/mesa/mesa.gyp:osmesa',
           ],
         }],
       ],
     },
   ],
 }