Update mojo sdk to rev 1dc8a9a5db73d3718d99917fadf31f5fb2ebad4f

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;
 
 enum AnEnum {
   FIRST, SECOND
 };
 
@@ skipping 22 matching lines @@
   map<string, int8> f_map_int8;
   PodUnion f_pod_union;
 };
 
 union HandleUnion {
   handle f_handle;
   handle<message_pipe> f_message_pipe;
   handle<data_pipe_consumer> f_data_pipe_consumer;
   handle<data_pipe_producer> f_data_pipe_producer;
   handle<shared_buffer> f_shared_buffer;
+  SmallCache f_small_cache;
+};
+
+struct HandleStruct {
+  SmallCache f_small_cache;
 };
 
 struct DummyStruct {
   int8 f_int8;
 };
 
 struct SmallStruct {
   DummyStruct? dummy_struct;
   PodUnion? pod_union;
   array<PodUnion>? pod_union_array;
+  array<PodUnion?>? nullable_pod_union_array;
   array<DummyStruct>? s_array;
   map<string, PodUnion>? pod_union_map;
+  map<string, PodUnion?>? nullable_pod_union_map;
 };
 
 struct SmallStructNonNullableUnion {
   PodUnion pod_union;
 };
 
 struct SmallObjStruct {
   ObjectUnion obj_union;
 };
+
+interface SmallCache {
+  SetIntValue(int64 int_value);
+  GetIntValue() => (int64 int_value);
+};
+
+interface UnionInterface {
+  Echo(PodUnion in) => (PodUnion out);
+};