Add GL_EXT_multisampled_render_to_texture support to 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 1517 matching lines @@
     'decoder_func': 'DoFlush',
   },
   'FramebufferRenderbuffer': {
     'decoder_func': 'DoFramebufferRenderbuffer',
     'gl_test_func': 'glFramebufferRenderbufferEXT',
   },
   'FramebufferTexture2D': {
     'decoder_func': 'DoFramebufferTexture2D',
     'gl_test_func': 'glFramebufferTexture2DEXT',
   },
+  'FramebufferTexture2DMultisampleEXT': {
+    'decoder_func': 'DoFramebufferTexture2DMultisample',
+    'gl_test_func': 'glFramebufferTexture2DMultisampleEXT',
+    'expectation': False,
+    'unit_test': False,
+    'extension': True,
+  },
   'GenerateMipmap': {
     'decoder_func': 'DoGenerateMipmap',
     'gl_test_func': 'glGenerateMipmapEXT',
   },
   'GenBuffers': {
     'type': 'GENn',
     'gl_test_func': 'glGenBuffersARB',
     'resource_type': 'Buffer',
     'resource_types': 'Buffers',
   },
@@ skipping 6245 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:]))