Add glGetFragDataLocation to gpu command buffer.

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 2010 matching lines @@
     'data_transfer_methods': ['shm'],
     'cmd_args': 'GLidProgram program, void* result, uint32_t result_size',
     'result': ['SizedResult<GLuint>'],
   },
   'GetAttribLocation': {
     'type': 'Custom',
     'data_transfer_methods': ['shm'],
     'cmd_args':
         'GLidProgram program, uint32_t name_bucket_id, GLint* location',
     'result': ['GLint'],
-    'error_return': -1, # http://www.opengl.org/sdk/docs/man/xhtml/glGetAttribLocation.xml
+    'error_return': -1,
+  },
+  'GetFragDataLocation': {
+    'type': 'Custom',
+    'data_transfer_methods': ['shm'],
+    'cmd_args':
+        'GLidProgram program, uint32_t name_bucket_id, GLint* location',
+    'result': ['GLint'],
+    'error_return': -1,
+    'unsafe': True,
   },
   'GetBooleanv': {
     'type': 'GETn',
     'result': ['SizedResult<GLboolean>'],
     'decoder_func': 'DoGetBooleanv',
     'gl_test_func': 'glGetBooleanv',
   },
   'GetBufferParameteriv': {
     'type': 'GETn',
     'result': ['SizedResult<GLint>'],
@@ skipping 8010 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:]))