Move third_party/mojo/src/mojo/public to mojo/public

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;
 
 enum AnEnum {
   FIRST, SECOND
 };
 
@@ skipping 76 matching lines @@
 };
 
 union OldUnion {
   int8 f_int8;
 };
 
 union NewUnion {
   int8 f_int8;
   int16 f_int16;
 };