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

ui/views/views.gyp

Index: ui/views/views.gyp
diff --git a/ui/views/views.gyp b/ui/views/views.gyp
index 4be5a1c53167bdeb20bb20b0372d246885412ffc..b7a8cd9a8e362976e2295e14b67af8668eaa5d13 100644
--- a/ui/views/views.gyp
+++ b/ui/views/views.gyp
@@ -483,6 +483,7 @@
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:test_support_base',
+        '../../base/allocator/allocator.gyp:allocator',
         # TODO(jcivelli): ideally the resource needed by views would be
         #                 factored out. (for some reason it pulls in a bunch
         #                 unrelated things like v8, sqlite nss...).
@@ -562,7 +563,6 @@
         ['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'],
           ],
         }],