Add support for enums within structs and interfaces to mojom.

mojo/public/bindings/generators/js_templates/module.js.tmpl

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define([
     "mojo/apps/js/bindings/core",
     "mojo/apps/js/bindings/codec",
   ], function(core, codec) {
 
 {#--- Enums #}
+{%- from "enum_definition.tmpl" import enum_def -%}
 {%  for enum in enums %}
-  var {{enum.name}} = {
-{%-   set next_value = 0 %}
-{%-   for field in enum.fields %}
-{%-     if field.value %}
-{%-       set next_value = field.value|int  %}
-{%-     endif %}
-    {{field.name}}: {{next_value}},
-{%-     set next_value = next_value + 1 %}
-{%-   endfor %}
-  };
-{%  endfor %}
+{{    enum_def("var %s"|format(enum.name), enum) }}
+{%-  endfor %}
 
 {#--- Struct definitions #}
-{%- for struct in structs %}
+{%  for struct in structs %}
 {%    include "struct_definition.tmpl" %}
 {%- endfor %}
 
 {#--- Interface definitions #}
 {%- for interface in interfaces %}
 {%-   include "interface_definition.tmpl" %}
 {%- endfor %}
 
   var exports = {};
 {%- for enum in enums %}
   exports.{{enum.name}} = {{enum.name}};
 {%- endfor %}
 {%- for struct in structs if struct.exported %}
   exports.{{struct.name}} = {{struct.name}};
 {%- endfor %}
 {%- for interface in interfaces %}
   exports.{{interface.name}}Proxy = {{interface.name}}Proxy;
   exports.{{interface.name}}Stub = {{interface.name}}Stub;
 {%- endfor %}
   return exports;
 });