Allow creating GLImage-backed textures with glTexStorage2D.

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 1034 matching lines @@
     ],
     'valid_es3': [
       'GL_TEXTURE_3D',
       'GL_TEXTURE_2D_ARRAY',
     ],
     'invalid': [
       'GL_TEXTURE_1D',
       'GL_TEXTURE_3D',
     ],
   },
+  'TextureBufferUsage': {
+    'type': 'GLenum',
+    'is_complete': True,
+    'valid': [
+      'GL_NONE',
+      'GL_TEXTURE_BUFFER_SCANOUT_CHROMIUM',
+    ],
+  },
   'TransformFeedbackBindTarget': {
     'type': 'GLenum',
     'valid': [
       'GL_TRANSFORM_FEEDBACK',
     ],
     'invalid': [
       'GL_TEXTURE_2D',
     ],
   },
   'TransformFeedbackPrimitiveMode': {
@@ skipping 10248 matching lines @@
   Format(gen.generated_cpp_filenames)
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))