Update mojo sdk to rev 1dc8a9a5db73d3718d99917fadf31f5fb2ebad4f

third_party/mojo/src/mojo/public/tools/bindings/generators/cpp_templates/union_definition.tmpl

Index: third_party/mojo/src/mojo/public/tools/bindings/generators/cpp_templates/union_definition.tmpl
diff --git a/third_party/mojo/src/mojo/public/tools/bindings/generators/cpp_templates/union_definition.tmpl b/third_party/mojo/src/mojo/public/tools/bindings/generators/cpp_templates/union_definition.tmpl
index 487d2a5cc137be900891db0b3d20dfc3f28d1541..087499a0d5d491fc7f65796ccf5563c8a1d37c83 100644
--- a/third_party/mojo/src/mojo/public/tools/bindings/generators/cpp_templates/union_definition.tmpl
+++ b/third_party/mojo/src/mojo/public/tools/bindings/generators/cpp_templates/union_definition.tmpl
@@ -62,8 +62,12 @@ void {{class_name}}::EncodePointersAndHandles(
     case {{enum_name}}::{{field.name|upper}}: {
 {%-   if field.kind|is_object_kind %}
       mojo::internal::Encode(&data.f_{{field.name}}, handles);
-{%-   elif field.kind|is_any_handle_kind or field.kind|is_interface_kind %}
+{%-   elif field.kind|is_any_handle_kind %}
       mojo::internal::EncodeHandle(&data.f_{{field.name}}, handles);
+{%-   elif field.kind|is_interface_kind %}
+      mojo::internal::EncodeHandle(
+          reinterpret_cast<mojo::internal::Interface_Data*>(
+              &data.f_{{field.name}}), handles);
 {%-   endif %}
       return;
     }
@@ -78,8 +82,12 @@ void {{class_name}}::DecodePointersAndHandles(
     case {{enum_name}}::{{field.name|upper}}: {
 {%-   if field.kind|is_object_kind %}
       mojo::internal::Decode(&data.f_{{field.name}}, handles);
-{%-   elif field.kind|is_any_handle_kind or field.kind|is_interface_kind %}
+{%-   elif field.kind|is_any_handle_kind %}
       mojo::internal::DecodeHandle(&data.f_{{field.name}}, handles);
+{%-   elif field.kind|is_interface_kind %}
+      mojo::internal::DecodeHandle(
+          reinterpret_cast<mojo::internal::Interface_Data*>(
+              &data.f_{{field.name}}), handles);
 {%-   endif %}
       return;
     }