Make touch drag drop and touch editing flags tri-state and turn them on by

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 280 matching lines @@
         'base/touch/touch_device_win.cc',
         'base/touch/touch_editing_controller.cc',
         'base/touch/touch_editing_controller.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.h',
         'base/ui_export.h',
         'base/view_prop.cc',
         'base/view_prop.h',
         'base/win/accessibility_ids_win.h',
         'base/win/accessibility_misc_utils.cc',
         'base/win/accessibility_misc_utils.h',
         'base/win/atl_module.h',
         'base/win/dpi.cc',
         'base/win/dpi.h',
@@ skipping 670 matching lines @@
               'xcode_settings': {
                 'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',
               },
             }],
           ],
         },
       ],
     }],
   ],
 }