Make the fuchsia mojo/public repo the source of truth.

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

-{#--- Constants #}
-{%-  for constant in module.constants %}
-  var {{constant.name}} = {{constant.value|expression_to_text}};
-{%- endfor %}
-
-{#--- Enums #}
-{%- from "enum_definition.tmpl" import enum_def %}
-{%- for enum in enums %}
-  var {{ enum_def(enum.name, enum) }}
-{%-  endfor %}
-
-{#--- Struct definitions #}
-{%  for struct in structs %}
-{%-   include "struct_definition.tmpl" %}
-{%- endfor -%}
-
-{#--- Union definitions #}
-{%- from "union_definition.tmpl" import union_def %}
-{%- for union in unions %}
-{{union_def(union)|indent(2)}}
-{%- endfor %}
-
-{#--- Interface definitions #}
-{%- for interface in interfaces -%}
-{%-   include "interface_definition.tmpl" %}
-{%- endfor %}
-
-  var exports = {};
-{%-  for constant in module.constants %}
-  exports.{{constant.name}} = {{constant.name}};
-{%- endfor %}
-{%- for enum in enums %}
-  exports.{{enum.name}} = {{enum.name}};
-{%- endfor %}
-{%- for struct in structs if struct.exported %}
-  exports.{{struct.name}} = {{struct.name}};
-{%- endfor %}
-{%- for union in unions %}
-  exports.{{union.name}} = {{union.name}};
-{%- endfor %}
-{%- for interface in interfaces %}
-  exports.{{interface.name}} = {{interface.name}};
-{#--- Interface Client #}
-{%-   if interface.client in interfaces|map(attribute='name') %}
-  exports.{{interface.name}}.client = {{interface.client}};
-{%-   elif interface.client in imported_interfaces %}
-  exports.{{interface.name}}.client = {{imported_interfaces[interface.client]}};
-{%-   endif %}
-{%- endfor %}