Update from https://crrev.com/309717

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 1756 matching lines @@
 """// 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.
 
 // This file is automatically generated.
 
 """ % {'name': set_name.upper()})
 
   # Write API declaration.
   for func in functions:
-    file.write('  virtual %s %sFn(%s) override;\n' %
+    file.write('  %s %sFn(%s) override;\n' %
       (func['return_type'], func['known_as'], func['arguments']))
 
   file.write('\n')
 
 
 def GenerateMockHeader(file, functions, set_name):
   """Generates gl_mock_autogen_x.h"""
 
   # Write file header.
   file.write(
@@ skipping 663 matching lines @@
 
     source_file = open(os.path.join(directory, 'gl_bindings_autogen_mock.cc'),
                        'wb')
     GenerateMockBindingsSource(source_file, GL_FUNCTIONS)
     source_file.close()
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))