Integrate Mojo JS validation bindings with the Router

mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl

 {%- set namespace_as_string = namespace|replace(".","::") %}
 {%- for method in interface.methods %}
   var k{{interface.name}}_{{method.name}}_Name = {{method.ordinal}};
 {%- endfor %}
 
   function {{interface.name}}Proxy(receiver) {
     this.receiver_ = receiver;
   }
 
   {{interface.name}}Proxy.NAME_ = '{{namespace_as_string}}::{{interface.name}}';
@@ skipping 139 matching lines @@
         break;
 {%-     endif %}
 {%-   endfor %}
     }
     if (paramsClass === null)
       return validator.validationError.NONE;
     return paramsClass.validate(messageValidator, messageValidator.message.getHeaderNumBytes());
 {%- endif %}
   }
 
+  {{interface.name}}Stub.prototype.validator = validate{{interface.name}}Request;
+{%- if interface|has_callbacks %}
+  {{interface.name}}Proxy.prototype.validator = validate{{interface.name}}Response;
+{%- else %}
+  {{interface.name}}Proxy.prototype.validator = null;
+{%- endif -%}
+
 {#--- Enums #}
 {%  from "enum_definition.tmpl" import enum_def -%}
 {%  for enum in interface.enums %}
   {{enum_def("%sProxy.%s"|format(interface.name, enum.name), enum, module)}}
   {{interface.name}}Stub.{{enum.name}} = {{interface.name}}Proxy.{{enum.name}};
 {%-  endfor %}
 
 {#--- Constants. #}
 {%  for constant in interface.constants %}
   {{interface.name}}Proxy.{{constant.name}} = {{constant.value|expression_to_text}};
   {{interface.name}}Stub.{{constant.name}} = {{interface.name}}Proxy.{{constant.name}};
-{%  endfor %}
+{%-  endfor %}