Refactored touch-events flag test, correcting "enabled" logic.

ui/ui.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,
   },
   'includes': [
     'shell_dialogs.gypi',
@@ skipping 311 matching lines @@
         'base/theme_provider.cc',
         'base/theme_provider.h',
         'base/touch/touch_device.cc',
         'base/touch/touch_device.h',
         'base/touch/touch_device_android.cc',
         'base/touch/touch_device_aurax11.cc',
         'base/touch/touch_device_ozone.cc',
         'base/touch/touch_device_win.cc',
         'base/touch/touch_editing_controller.cc',
         'base/touch/touch_editing_controller.h',
+        'base/touch/touch_enabled.cc',
+        'base/touch/touch_enabled.h',
         'base/touch/touch_factory_x11.cc',
         'base/touch/touch_factory_x11.h',
         'base/ui_base_exports.cc',
         'base/ui_base_paths.cc',
         'base/ui_base_paths.h',
         'base/ui_base_switches.cc',
         'base/ui_base_switches.h',
         'base/ui_base_switches_util.cc',
         'base/ui_base_switches_util.h',
         'base/ui_base_types.cc',
@@ skipping 689 matching lines @@
               'xcode_settings': {
                 'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',
               },
             }],
           ],
         },
       ],
     }],
   ],
 }