Add support for getting the 256x256 app icon on Windows.

ui/ui_unittests.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'ui_test_support',
       'type': 'static_library',
       'dependencies': [
@@ skipping 139 matching lines @@
           ],
           # The ResourceBundle unittest expects a locale.pak file to exist in
           # the bundle for English-US. Copy it in from where it was generated
           # by ui_strings.gyp:ui_unittest_strings.
           'mac_bundle_resources': [
             '<(PRODUCT_DIR)/ui_unittests_strings/en.lproj/locale.pak',
           ],
         }],
         ['OS == "win"', {
           'sources': [
+            'test/ui_unittests.rc',
             'base/dragdrop/os_exchange_data_win_unittest.cc',
             'base/win/hwnd_subclass_unittest.cc',
             'gfx/font_fallback_win_unittest.cc',
             'gfx/icon_util_unittest.cc',
             'gfx/platform_font_win_unittest.cc',
           ],
           'include_dirs': [
             '../..',
             '../third_party/wtl/include',
           ],
@@ skipping 123 matching lines @@
           'variables': {
             'test_suite_name': 'ui_unittests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)ui_unittests<(SHARED_LIB_SUFFIX)',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }