Add SK_IGNORE_MAC_FONT_WEIGHT_FIX to prepare for rebaseline.

skia/skia_common.gypi

 # Copyright 2013 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.
 
 # This gypi file handles the removal of platform-specific files from the
 # Skia build.
 {
   'includes': [
     # blink_skia_config.gypi defines blink_skia_defines
     '../third_party/WebKit/public/blink_skia_config.gypi',
@@ skipping 141 matching lines @@
           'SK_BUILD_FOR_ANDROID',
         ],
       }],
     ],
   },
 
   'defines': [
     '<@(skia_export_defines)',
 
     'SK_DEFAULT_FONT_CACHE_LIMIT=<(default_font_cache_limit)',
+    'SK_IGNORE_MAC_FONT_WEIGHT_FIX=1',
   ],
 
   'direct_dependent_settings': {
     'defines': [
       '<@(skia_export_defines)',
     ],
   },
 
   # We would prefer this to be direct_dependent_settings,
   # however we currently have no means to enforce that direct dependents
   # re-export if they include Skia headers in their public headers.
   'all_dependent_settings': {
     'include_dirs': [
       '..',
       'config',
     ],
   },
 
   'msvs_disabled_warnings': [4244, 4267, 4341, 4345, 4390, 4554, 4748, 4800],
 }