JavaScript bindings for Mojo message validation

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

Index: mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl
diff --git a/mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl b/mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl
index d46f8eeac9ce86a90c5dc48f7c162ff9f61aac02..544b0e29354fec006bfe7437c87a65d408bb0130 100644
--- a/mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/js_templates/interface_definition.tmpl
@@ -108,6 +108,55 @@ params.{{parameter.name}}{% if not loop.last %}, {% endif -%}
     }
   };
 
+{#--- Validation #}
+
+  function validate{{interface.name}}Request(messageValidator) {
+{%- if not(interface.methods) %}
+    return validator.validationError.NONE;
+{%- else %}
+    var message = messageValidator.message;
+    var paramsClass = null;
+    switch (message.getName()) {
+{%- for method in interface.methods %}
+      case k{{interface.name}}_{{method.name}}_Name:
+{%-   if method.response_parameters == None %}
+        if (!message.expectsResponse() && !message.isResponse())
+          paramsClass = {{interface.name}}_{{method.name}}_Params;
+{%-     else %}
+        if (message.expectsResponse())
+          paramsClass = {{interface.name}}_{{method.name}}_Params;
+{%-     endif %}
+      break;
+{%- endfor %}
+    }
+    if (paramsClass === null)
+      return validator.validationError.NONE;
+    return paramsClass.validate(messageValidator, codec.kMessageHeaderSize);
+{%- endif %}
+  }
+
+  function validate{{interface.name}}Response(messageValidator) {
+{%- if not(interface|has_callbacks) %}
+    return validator.validationError.NONE;
+{%- else %}
+   var message = messageValidator.message;
+   var paramsClass = null;
+   switch (message.getName()) {
+{%- for method in interface.methods %}
+{%- if method.response_parameters != None %}
+      case k{{interface.name}}_{{method.name}}_Name:
+        if (message.isResponse())
+          paramsClass = {{interface.name}}_{{method.name}}_ResponseParams;
+        break;
+{%- endif %}
+{%- endfor %}
+    }
+    if (paramsClass === null)
+      return validator.validationError.NONE;
+    return paramsClass.validate(messageValidator, codec.kMessageWithRequestIDHeaderSize);
+{%- endif %}
+  }
+
 {#--- Enums #}
 {%  from "enum_definition.tmpl" import enum_def -%}
 {%  for enum in interface.enums %}