gpu: Add the ability to wait on upload completion.

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 2278 matching lines @@
     'extension': True,
     'chromium': True,
   },
   'AsyncTexSubImage2DCHROMIUM': {
     'type': 'Manual',
     'immediate': False,
     'client_test': False,
     'extension': True,
     'chromium': True,
   },
+  'WaitAsyncTexImage2DCHROMIUM': {
+    'type': 'Manual',
+    'immediate': False,
+    'client_test': False,
+    'extension': True,
+    'chromium': True,
+  },
   'DiscardFramebufferEXT': {
     'type': 'PUTn',
     'count': 1,
     'data_type': 'GLenum',
     'cmd_args': 'GLenum target, GLsizei count, '
         'const GLenum* attachments',
     'decoder_func': 'DoDiscardFramebufferEXT',
     'unit_test': False,
     'client_test': False,
     'extension': True,
@@ skipping 5264 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:]))