Fix a misuse of framebuffer target in GLHelper (2)

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 os
 import os.path
 import sys
@@ skipping 58 matching lines @@
     'invalid': [
       'GL_LINEAR_MIPMAP_LINEAR',
     ],
   },
   'FrameBufferTarget': {
     'type': 'GLenum',
     'valid': [
       'GL_FRAMEBUFFER',
     ],
     'invalid': [
+      'GL_DRAW_FRAMEBUFFER' ,
       'GL_READ_FRAMEBUFFER' ,
     ],
   },
   'RenderBufferTarget': {
     'type': 'GLenum',
     'valid': [
       'GL_RENDERBUFFER',
     ],
     'invalid': [
       'GL_FRAMEBUFFER',
@@ skipping 6248 matching lines @@
     gen.WriteCommonUtilsImpl("common/gles2_cmd_utils_implementation_autogen.h")
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))