Replace GR_MAC_BUILD by SK_BUILD_FOR_MAC.

gyp/gpu.gyp

 {
   'target_defaults': {
     'conditions': [
       ['skia_os != "win"', {
         'sources/': [ ['exclude', '_win.(h|cpp)$'],
         ],
       }],
       ['skia_os != "mac"', {
         'sources/': [ ['exclude', '_mac.(h|cpp|m|mm)$'],
         ],
       }],
       ['skia_os != "linux" and skia_os != "chromeos"', {
         'sources/': [ ['exclude', '_unix.(h|cpp)$'],
         ],
       }],
       ['skia_os != "ios"', {
         'sources/': [ ['exclude', '_iOS.(h|cpp|m|mm)$'],
         ],
       }],
       ['skia_os != "android"', {
         'sources/': [ ['exclude', '_android.(h|cpp)$'],
         ],
       }],
       ['skia_os != "nacl"', {
         'sources/': [ ['exclude', '_nacl.(h|cpp)$'],
         ],
       }],
-      [ 'skia_os == "android"', {
-        'defines': [
-          'GR_ANDROID_BUILD=1',
-        ],
-      }],
-      [ 'skia_os == "mac"', {
-        'defines': [
-          'GR_MAC_BUILD=1',
-        ],
-      }],
-      [ 'skia_os == "linux" or skia_os == "chromeos"', {
-        'defines': [
-          'GR_LINUX_BUILD=1',
-        ],
-      }],
-      [ 'skia_os == "ios"', {
-        'defines': [
-          'GR_IOS_BUILD=1',
-        ],
-      }],
-      [ 'skia_os == "win"', {
-        'defines': [
-          'GR_WIN32_BUILD=1',
-        ],
-      }],
       # nullify the targets in this gyp file if skia_gpu is 0
       [ 'skia_gpu == 0', {
         'sources/': [
           ['exclude', '.*'],
         ],
         'defines/': [
           ['exclude', '.*'],
         ],
         'include_dirs/': [
            ['exclude', '.*'],
@@ skipping 13 matching lines @@
         },
       }],
       [ 'skia_texture_cache_mb_limit != 0', {
         'defines': [
           'GR_DEFAULT_TEXTURE_CACHE_MB_LIMIT=<(skia_texture_cache_mb_limit)',
         ],
       }],
     ],
     'direct_dependent_settings': {
       'conditions': [
-        [ 'skia_os == "android"', {
-          'defines': [
-            'GR_ANDROID_BUILD=1',
-          ],
-        }],
-        [ 'skia_os == "mac"', {
-          'defines': [
-            'GR_MAC_BUILD=1',
-          ],
-        }],
-        [ 'skia_os == "linux"', {
-          'defines': [
-            'GR_LINUX_BUILD=1',
-          ],
-        }],
-        [ 'skia_os == "ios"', {
-          'defines': [
-            'GR_IOS_BUILD=1',
-          ],
-        }],
         [ 'skia_os == "win"', {
           'defines': [
-            'GR_WIN32_BUILD=1',
             'GR_GL_FUNCTION_TYPE=__stdcall',
           ],
         }],
       ],
       'include_dirs': [
         '../include/gpu',
       ],
     },
   },
   'targets': [
@@ skipping 140 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: