Assume all TURBO_HAS_* are true.

gyp/codec.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # GYP file for codec project.
@@ skipping 41 matching lines @@
         '../src/codec/SkWebpCodec.cpp',
 
         '../src/codec/SkCodecImageGenerator.cpp',
         '../src/ports/SkImageGenerator_skia.cpp',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '../include/codec',
         ],
       },
-      'defines': [
-        # Turn on libjpeg-turbo optimizations since we know that the
-        # appropriate version of libjpeg-turbo is present.
-        'TURBO_HAS_CROP',
-        'TURBO_HAS_SKIP',
-        'TURBO_HAS_565',
-      ],
       'conditions': [
         ['skia_codec_decodes_raw', {
           'dependencies': [
             'raw_codec',
           ],
         },],
       ],
     }, {
       # RAW codec needs exceptions. Due to that, it is a separate target. Its usage can be
       # controlled by skia_codec_decodes_raw flag.
@@ skipping 40 matching lines @@
         ['skia_os == "ios" or skia_os == "mac"', {
           'xcode_settings': {
             'OTHER_CFLAGS': ['-fexceptions'],
             'OTHER_CPLUSPLUSFLAGS': ['-fexceptions'],
           },
         }],
       ],
     },
   ],
 }