Mojo C++ bindings: custom type mapping of map

mojo/public/cpp/bindings/tests/struct_with_traits_impl_traits.cc

 // Copyright 2016 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.
 
 #include "mojo/public/cpp/bindings/tests/struct_with_traits_impl_traits.h"
 
 namespace mojo {
 namespace {
 
 struct Context {
@@ skipping 57 matching lines @@
 
   if (!data.ReadFStringArray(&out->get_mutable_string_array()))
     return false;
 
   if (!data.ReadFStruct(&out->get_mutable_struct()))
     return false;
 
   if (!data.ReadFStructArray(&out->get_mutable_struct_array()))
     return false;
 
+  if (!data.ReadFStructMap(&out->get_mutable_struct_map()))
+    return false;
+
   return true;
 }
 
 // static
 bool StructTraits<test::PassByValueStructWithTraits,
                   test::PassByValueStructWithTraitsImpl>::
     Read(test::PassByValueStructWithTraitsDataView data,
          test::PassByValueStructWithTraitsImpl* out) {
   out->get_mutable_handle() = data.TakeFHandle();
   return true;
 }
 
 }  // namespace mojo