Mojo: more idiomatic C++ bindings

mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl

 {%- set class_name = struct.name -%}
 {%- set dtor_name = [] %}
 {%- if struct|is_struct_with_handles %}
 {%-   set _ = dtor_name.append("&internal::%s_Data_Destructor"|format(struct.name)) %}
 {%- else %}
 {%-   set _ = dtor_name.append("NULL") %}
 {%- endif %}
 
 {%- macro set_default(kind, value, depth) -%}
 {#--- Strings ---#}
@@ skipping 29 matching lines @@
 {%-     endfilter %}
 {%-   endfor -%}
   {{caller("tmp" ~ depth ~ ".Finish()")|indent(2)}}
 }
 {#--- POD types ---#}
 {%-   else -%}
 {{caller(value|expression_to_text(module))}}
 {%-   endif %}
 {%- endmacro %}
 
+#if 0
 {{class_name}}::Builder::Builder(mojo::Buffer* buf)
     : data_(Data::New(buf, {{dtor_name[0]}})) {
 {%- for pf in struct.packed.packed_fields if pf.field.default %}
 {%-   filter indent(2) %}
 {%-     call(result) set_default(pf.field.kind, pf.field.default, 0) %}
 set_{{pf.field.name}}({{result}});
 {%-     endcall %}
 {%-   endfilter %}
 {%- endfor %}
 }
 
 {{class_name}} {{class_name}}::Builder::Finish() {
   Data* data = NULL;
   std::swap(data, data_);
   return mojo::internal::Wrap(data);
 }
+#endif
+
+// static
+{{class_name}}Ptr {{class_name}}::New() {
+  {{class_name}}Ptr rv;
+  mojo::internal::StructHelper<{{class_name}}>::Initialize(&rv);
+  return rv.Pass();
+}
+
+{{class_name}}::{{class_name}}()
+{%-for field in struct.fields %}
+    {% if loop.first %}:{% else %} {% endif %} {{field.name}}(){% if not loop.last %},{% endif %}
+{%- endfor %} {
+}
+
+{{class_name}}::~{{class_name}}() {
+}