Workaround for Intel 6xxx clear to 0/1 bug

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 2518 matching lines @@
   },
   'ClearBufferfi': {
     'es3': True,
     'decoder_func': 'DoClearBufferfi',
     'unit_test': False,
     'trace_level': 2,
   },
   'ClearColor': {
     'type': 'StateSet',
     'state': 'ClearColor',
+    'decoder_func': 'DoClearColor',
   },
   'ClearDepthf': {
     'type': 'StateSet',
     'state': 'ClearDepthf',
     'decoder_func': 'glClearDepth',
     'gl_test_func': 'glClearDepth',
     'valid_args': {
       '0': '0.5f'
     },
   },
@@ skipping 8756 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:]))