Update mojo sdk to rev 8af2ccff2eee4bfca1043015abee30482a030b30

third_party/mojo/src/mojo/public/interfaces/bindings/tests/test_unions.mojom

 // Copyright 2014 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.
 
 module mojo.test;
 
 union PodUnion {
   int8   f_int8;
   int8   f_int8_other;
   uint8  f_uint8;
   int16  f_int16;
   uint16 f_uint16;
   int32  f_int32;
   uint32 f_uint32;
   int64  f_int64;
   uint64 f_uint64;
   float  f_float;
   double f_double;
   bool   f_bool;
+};
+
+union ObjectUnion {
+  int8   f_int8;
   string f_string;
 };
-
-struct SomeStruct {
-  string f_string;
-};