Turn on canvas_skia for OSX

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',
       'dependencies': [
         '../base/base.gyp:base',
@@ skipping 152 matching lines @@
         'base/models/list_selection_model_unittest.cc',
         'base/models/tree_node_model_unittest.cc',
         'base/ozone/evdev/touch_event_converter_ozone_unittest.cc',
         'base/test/data/resource.h',
         'base/text/bytes_formatting_unittest.cc',
         'base/text/utf16_indexing_unittest.cc',
         'base/view_prop_unittest.cc',
         'gfx/blit_unittest.cc',
         'gfx/break_list_unittest.cc',
         'gfx/canvas_unittest.cc',
+        'gfx/canvas_unittest_mac.mm',
         'gfx/codec/jpeg_codec_unittest.cc',
         'gfx/color_analysis_unittest.cc',
         'gfx/font_list_unittest.cc',
         'gfx/image/image_mac_unittest.mm',
         'gfx/image/image_util_unittest.cc',
         'gfx/platform_font_mac_unittest.mm',
         'gfx/render_text_unittest.cc',
         'gfx/transform_util_unittest.cc',
         'shell_dialogs/select_file_dialog_win_unittest.cc',
         'webui/web_ui_util_unittest.cc',
@@ skipping 172 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' ],
         },
       ],
     }],
   ],
 }