Add support for EXT_image_flush_external extension

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 1478 matching lines @@
                  ] }],
   'arguments': 'EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, '
       'EGLint* value' },
 { 'return_type': 'EGLBoolean',
   'names': ['eglGetSyncValuesCHROMIUM'],
   'arguments':
       'EGLDisplay dpy, EGLSurface surface, '
       'EGLuint64CHROMIUM* ust, EGLuint64CHROMIUM* msc, '
       'EGLuint64CHROMIUM* sbc', },
 { 'return_type': 'EGLBoolean',
+  'names': ['eglImageFlushExternalEXT'],
+  'arguments':
+      'EGLDisplay dpy, EGLImageKHR image, const EGLAttrib* attrib_list' },
+{ 'return_type': 'EGLBoolean',
   'names': ['eglInitialize'],
   'arguments': 'EGLDisplay dpy, EGLint* major, EGLint* minor', },
 { 'return_type': 'EGLBoolean',
   'names': ['eglMakeCurrent'],
   'arguments':
       'EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx', },
 { 'return_type': 'EGLBoolean',
   'names': ['eglPostSubBufferNV'],
   'arguments': 'EGLDisplay dpy, EGLSurface surface, '
     'EGLint x, EGLint y, EGLint width, EGLint height', },
@@ skipping 1367 matching lines @@
                                     'gl_enums_implementation_autogen.h'),
                        'wb')
     GenerateEnumUtils(header_file, enum_header_filenames)
     header_file.close()
     ClangFormat(header_file.name)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))