gpu: Add extension check when initializing MailboxSync

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 888 matching lines @@
 { 'return_type': 'EGLBoolean',
   'names': ['eglChooseConfig'],
   'arguments': 'EGLDisplay dpy, const EGLint* attrib_list, EGLConfig* configs, '
                'EGLint config_size, EGLint* num_config', },
 { 'return_type': 'EGLBoolean',
   'names': ['eglGetConfigAttrib'],
   'arguments':
       'EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint* value', },
 { 'return_type': 'EGLImageKHR',
   'versions': [{ 'name': 'eglCreateImageKHR',
-                 'extensions': ['EGL_KHR_image_base'] }],
+                 'extensions':
+                     ['EGL_KHR_image_base', 'EGL_KHR_gl_texture_2D_image'] }],
   'arguments':
       'EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, '
       'const EGLint* attrib_list' },
 { 'return_type': 'EGLBoolean',
   'versions': [{ 'name' : 'eglDestroyImageKHR',
                  'extensions': ['EGL_KHR_image_base'] }],
   'arguments': 'EGLDisplay dpy, EGLImageKHR image' },
 { 'return_type': 'EGLSurface',
   'names': ['eglCreateWindowSurface'],
   'arguments': 'EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, '
@@ skipping 1093 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:]))