Add context to gfx::Screen calls in support of simultaneous desktop+ash

chrome/chrome_browser_ui.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
@@ skipping 1041 matching lines @@
         'browser/ui/gtk/web_dialog_gtk.h',
         'browser/ui/gtk/web_intent_picker_gtk.cc',
         'browser/ui/gtk/web_intent_picker_gtk.h',
         'browser/ui/gtk/website_settings/permission_selector.cc',
         'browser/ui/gtk/website_settings/permission_selector.h',
         'browser/ui/gtk/website_settings/permission_selector_observer.h',
         'browser/ui/gtk/website_settings/website_settings_popup_gtk.cc',
         'browser/ui/gtk/website_settings/website_settings_popup_gtk.h',
         'browser/ui/gtk/zoom_bubble_gtk.cc',
         'browser/ui/gtk/zoom_bubble_gtk.h',
+        'browser/ui/host_desktop.cc',
+        'browser/ui/host_desktop.h',
         'browser/ui/hung_plugin_tab_helper.cc',
         'browser/ui/hung_plugin_tab_helper.h',
         'browser/ui/intents/web_intent_inline_disposition_delegate.cc',
         'browser/ui/intents/web_intent_inline_disposition_delegate.h',
         'browser/ui/intents/web_intent_picker.cc',
         'browser/ui/intents/web_intent_picker.h',
         'browser/ui/intents/web_intent_picker_controller.cc',
         'browser/ui/intents/web_intent_picker_controller.h',
         'browser/ui/intents/web_intent_picker_delegate.h',
         'browser/ui/intents/web_intent_picker_model.cc',
@@ skipping 1576 matching lines @@
             ['exclude', '^browser/ui/views/select_file_dialog_extension.cc'],
             ['exclude', '^browser/ui/views/select_file_dialog_extension.h'],
             ['exclude', '^browser/ui/views/select_file_dialog_extension_factory.cc'],
             ['exclude', '^browser/ui/views/select_file_dialog_extension_factory.h'],
           ]}
         ],
       ],
     },
   ],
 }