Add Skia on Chrome for Mac gyp rules

skia/skia.gyp

 # Copyright (c) 2011 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': 'skia',
       'type': '<(component)',
       'sources': [
@@ skipping 769 matching lines @@
             '../third_party/skia/src/ports/SkFontHost_FreeType_Subpixel.cpp',
           ],
           'defines': [
             'SK_SUPPORT_LCDTEXT',
           ],
         }],
         [ 'OS == "mac"', {
           'defines': [
             'SK_BUILD_FOR_MAC',
           ],
-          'sources/': [
-            ['exclude', '/pdf/'],
-            ['exclude', 'ext/vector_platform_device_skia\\.(cc|h)'],
-          ],
           'include_dirs': [
             '../third_party/skia/include/utils/mac',
           ],
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
             ],
           },
+          'conditions': [
+             [ 'use_skia == 0', {
+               'sources/': [
+                 ['exclude', '/pdf/'],
+                 ['exclude', 'ext/vector_platform_device_skia\\.(cc|h)'],
+               ],
+            },
+            { # use_skia
+              'defines': [
+                'SK_SUPPORT_888_TEXT',
+                'SK_USE_MAC_CORE_TEXT',
+              ],
+            }],
+          ],
         }],
         [ 'OS == "win"', {
           'sources!': [
             '../third_party/skia/src/core/SkMMapStream.cpp',
             '../third_party/skia/src/ports/SkTime_Unix.cc',
             'ext/SkThread_chrome.cc',
           ],
           'include_dirs': [
             'config/win',
           ],
@@ skipping 180 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: