Mojo: Move mojo/public/bindings to mojo/public/tools/bindings.

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

 class {{struct.name}} {
  public:
   typedef internal::{{struct.name}}_Data Data;
 
 {#--- Enums #}
 {%- for enum in struct.enums -%}
 {%    macro enum_def() %}{% include "enum_declaration.tmpl" %}{% endmacro %}
   {{enum_def()|indent(2)}}
 {%- endfor %}
 
@@ skipping 67 matching lines @@
   };
 
  private:
   friend class mojo::internal::WrapperHelper<{{struct.name}}>;
 
   struct Wrap {};
   {{struct.name}}(Wrap, const Data* data) : data_(data) {}
 
   const Data* data_;
 };