Generate a templated Clone method for all mojo structs.

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

Index: mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
diff --git a/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
index 2bd7ceb337dbfb7f7fef8fdc0158b68060132605..d35c2a352bfb2bcc678a5828c98e1dc6564cee81 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
@@ -18,7 +18,7 @@
 {{struct.name}}Ptr {{struct.name}}::Clone() const {
   {{struct.name}}Ptr rv(New());
 {%-   for field in struct.fields %}
-{%-     if field.kind|is_object_kind and not field.kind|is_string_kind %}
+{%-     if field.kind|is_object_kind and not field.kind|is_string_kind and not field.kind|is_typemapped_kind%}

[yzshen1, 2016/05/26 16:24:14]

style nit: 
- one space before %}
- break the line into 2 lines so that it doesn't exceed 80 chars. (I know we
don't strictly follow this rule in tmpl files, but nice to do it whenever
possible.)

[Sam McNally, 2016/05/27 02:57:40]

Done.

   rv->{{field.name}} = {{field.name}}.Clone();
 {%-     else %}
   rv->{{field.name}} = {{field.name}};