Add ability to set resolution on external display

ash/ash.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,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
   },
   'includes': [
@@ skipping 80 matching lines @@
         'display/display_error_observer.h',
         'display/display_info.h',
         'display/display_info.cc',
         'display/display_layout.h',
         'display/display_layout.cc',
         'display/display_layout_store.h',
         'display/display_layout_store.cc',
         'display/display_manager.cc',
         'display/display_manager.h',
         'display/display_pref_util.h',
+        'display/display_util_x11.cc',
+        'display/display_util_x11.h',
         'display/event_transformation_handler.cc',
         'display/event_transformation_handler.h',
         'display/mirror_window_controller.cc',
         'display/mirror_window_controller.h',
         'display/mouse_cursor_event_filter.cc',
         'display/mouse_cursor_event_filter.h',
         'display/output_configurator_animation.cc',
         'display/output_configurator_animation.h',
         'display/root_window_transformers.cc',
         'display/root_window_transformers.h',
@@ skipping 673 matching lines @@
           'dependencies': [
             # Mac tests access resources via the 'AuraShell.app' directory.
             'ash_shell',
           ],
           # Special linker instructions that avoids stripping Obj-C classes that
           # are not referenced in code, but are referenced in nibs.
           'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
         }],
         ['use_x11==1', {
           'sources': [
-            'display/display_change_observer_x11_unittest.cc'
+            'display/display_util_x11_unittest.cc'
           ],
         }],
         ['chromeos!=1', {
           'sources/': [
             ['exclude', 'display/display_error_observer_unittest.cc'],
           ],
         }, {  # chromeos==1
           'dependencies': [
             '../chromeos/chromeos.gyp:power_manager_proto',
           ],
@@ skipping 99 matching lines @@
             'shell/cocoa/app-Info.plist',
           ],
           'xcode_settings': {
             'INFOPLIST_FILE': 'shell/cocoa/app-Info.plist',
           },
         }],
       ],
     },
   ],
 }