Delete MacVDA from the codebase since it is dead code and not being worked on.

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 134 matching lines @@
         'gfx/break_list_unittest.cc',
         'gfx/canvas_unittest.cc',
         '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',
-        'gfx/video_decode_acceleration_support_mac_unittest.mm',
         'shell_dialogs/select_file_dialog_win_unittest.cc',
         'webui/web_ui_util_unittest.cc',
       ],
       'include_dirs': [
         '../',
       ],
       'conditions': [
         ['OS!="ios"', {
           'sources' : ['<@(_all_sources)'],
           'includes': [
@@ skipping 156 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' ],
         },
       ],
     }],
   ],
 }