Redo of Issue 8621006: Remove most obvious TOUCH_UI code.

ui/ui.gyp

 # Copyright (c) 2011 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,
   },
-  'target_defaults': {
-    'conditions': [
-      ['touchui==0', {'sources/': [
-        ['exclude', '_(touch)\\.cc$'],
-      ]}],
-    ],
-  },
   'includes': [
     'ui_resources.gypi',
   ],
   'targets': [
     {
       'target_name': 'ui',
       'type': '<(component)',
       'variables': { 'enable_wexit_time_destructors': 1, },
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 623 matching lines @@
                 'shutil.copyfile(\'<(ui_copy_target)\', \'<(ui_copy_dest)\'); ' \
                 'os.chmod(\'<(ui_copy_dest)\', 0700)'
               ]
             }
           ],
         },
       ],
     }],
   ],
 }