Clean up of GLES2 Command Decoder by moving some of the error state into a separate class.

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 1559 matching lines @@
   },
   'GetBufferParameteriv': {
     'type': 'GETn',
     'result': ['SizedResult<GLint>'],
     'decoder_func': 'DoGetBufferParameteriv',
     'expectation': False,
     'shadowed': True,
   },
   'GetError': {
     'type': 'Is',
-    'decoder_func': 'GetGLError',
+    'decoder_func': 'GetErrorState()->GetGLError',
     'impl_func': False,
     'result': ['GLenum'],
     'client_test': False,
   },
   'GetFloatv': {
     'type': 'GETn',
     'result': ['SizedResult<GLfloat>'],
     'decoder_func': 'DoGetFloatv',
     'gl_test_func': 'glGetFloatv',
   },
@@ skipping 6071 matching lines @@
     gen.WriteGLES2Header("../GLES2/gl2chromium_autogen.h")
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))