Add Windows commandline switch --enable-views-textfield.

ui/views/views.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,
   },
 
   'target_defaults': {
     'conditions': [
@@ skipping 545 matching lines @@
               '-loleacc.lib',
             ]
           },
           'include_dirs': [
             '../third_party/wtl/include',
           ],
         }],
         ['use_aura==0 and OS=="win"', {
           'sources/': [
             ['exclude', 'controls/combobox/native_combobox_views_unittest.cc'],
-            ['exclude', 'controls/textfield/native_textfield_views_unittest.cc'],
             ['exclude', 'controls/tree/tree_view_views_unittest.cc'],
           ],
         }],
         [ 'use_aura==1', {
           'dependencies': [
             '../aura/aura.gyp:test_support_aura',
           ],
           'sources/': [
             ['exclude', 'controls/tabbed_pane/tabbed_pane_unittest.cc'],
             ['exclude', 'controls/table/table_view_unittest.cc'],
@@ skipping 156 matching lines @@
           'sources/': [
             # This is needed because the aura rule strips it from the default
             # sources list.
             ['include', '^../../content/app/startup_helper_win.cc'],
           ],
         }],
       ],
     },  # target_name: views_examples_lib
   ],
 }