command_buffer: expose SRC_ALPHA_SATURATE when on GLES 3

gpu/command_buffer/build_gles2_cmd_buffer.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """code generator for GLES2 command buffers."""
 
 import itertools
 import os
 import os.path
@@ skipping 1157 matching lines @@
       'GL_ONE_MINUS_DST_COLOR',
       'GL_SRC_ALPHA',
       'GL_ONE_MINUS_SRC_ALPHA',
       'GL_DST_ALPHA',
       'GL_ONE_MINUS_DST_ALPHA',
       'GL_CONSTANT_COLOR',
       'GL_ONE_MINUS_CONSTANT_COLOR',
       'GL_CONSTANT_ALPHA',
       'GL_ONE_MINUS_CONSTANT_ALPHA',
     ],
+    'valid_es3': [
+      'GL_SRC_ALPHA_SATURATE'
+    ]
   },
   'Capability': {
     'type': 'GLenum',
     'valid': ["GL_%s" % cap['name'].upper() for cap in _CAPABILITY_FLAGS
         if ('es3' not in cap or cap['es3'] != True)
               and 'extension_flag' not in cap],
     'valid_es3': ["GL_%s" % cap['name'].upper() for cap in _CAPABILITY_FLAGS
         if ('es3' in cap and cap['es3'] == True)
               and 'extension_flag' not in cap],
     'invalid': [
@@ skipping 10122 matching lines @@
   Format(gen.generated_cpp_filenames)
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))