MacViews: Add native drop shadow to dialogs on OSX < 10.10.

ui/gfx/gfx_tests.gyp

 # Copyright 2014 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,
   },
   'targets': [
     {
@@ skipping 45 matching lines @@
         'geometry/rect_unittest.cc',
         'geometry/safe_integer_conversions_unittest.cc',
         'geometry/scroll_offset_unittest.cc',
         'geometry/size_unittest.cc',
         'geometry/vector2d_unittest.cc',
         'geometry/vector3d_unittest.cc',
         'image/image_mac_unittest.mm',
         'image/image_util_unittest.cc',
         'mac/coordinate_conversion_unittest.mm',
         'nine_image_painter_unittest.cc',
+        'path_mac_unittest.mm',
         'platform_font_linux_unittest.cc',
         'platform_font_mac_unittest.mm',
         'range/range_mac_unittest.mm',
         'range/range_unittest.cc',
         'range/range_win_unittest.cc',
         'render_text_unittest.cc',
         'screen_win_unittest.cc',
         'sequential_id_generator_unittest.cc',
         'shadow_value_unittest.cc',
         'skbitmap_operations_unittest.cc',
@@ skipping 123 matching lines @@
               'dependencies': [
                 '../../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }