Make gl_bindings_skia_in_process work with OpenGL ES3

ui/gl/generate_bindings.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 GL/GLES extension wrangler."""
 
 import optparse
 import os
 import collections
@@ skipping 603 matching lines @@
   'names': ['glGetShaderPrecisionFormat'],
   'arguments': 'GLenum shadertype, GLenum precisiontype, '
                'GLint* range, GLint* precision', },
 { 'return_type': 'void',
   'names': ['glGetShaderSource'],
   'arguments':
       'GLuint shader, GLsizei bufsize, GLsizei* length, char* source', },
 { 'return_type': 'const GLubyte*',
   'names': ['glGetString'],
   'arguments': 'GLenum name', },
+{ 'return_type': 'const GLubyte*',
+  'names': ['glGetStringi'],
+  'arguments': 'GLenum name, GLuint index', },
 { 'return_type': 'void',
   'versions': [{ 'name': 'glGetSynciv',
                  'extensions': ['GL_ARB_sync'] }],
   'arguments':
     'GLsync sync, GLenum pname, GLsizei bufSize, GLsizei* length,'
     'GLint* values', },
 { 'return_type': 'void',
   'names': ['glGetTexLevelParameterfv'],
   'arguments': 'GLenum target, GLint level, GLenum pname, GLfloat* params', },
 { 'return_type': 'void',
@@ skipping 1916 matching lines @@
                                     'gl_enums_implementation_autogen.h'),
                        'wb')
     GenerateEnumUtils(header_file, enum_header_filenames)
     header_file.close()
     ClangFormat(header_file.name)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))