mojo: Start generating structs for python bindings

mojo/public/tools/bindings/generators/python_templates/module.py.tmpl

+{% from "module_macros.tmpl" import enum_values %}
 # Copyright 2014 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.
 
 import mojo.bindings.reflection as _reflection
 {% if imports %}
 
 {% for import in imports %}
 import {{import.python_module}}
 {% endfor %}
 {% endif %}
 {#--- Constants #}
 {% if module.constants %}
 
 {% for constant in module.constants %}
 {{constant|name}} = {{constant.value|expression_to_text}}
 {% endfor %}
 {% endif %}
 {% for enum in module.enums %}
 
-class {{enum.name}}(object):
+class {{enum|name}}(object):
   __metaclass__ = _reflection.MojoEnumType
-  VALUES = [
-{%   for field in enum.fields %}
-    ('{{field.name}}', {{field.computed_value}}),
-{%   endfor %}
-  ]
+  VALUES = {{enum_values(enum)|indent(2)}}
 {% endfor %}
+{% for struct in module.structs %}
+
+class {{struct|name}}(object):
+  __metaclass__ = _reflection.MojoStructType
+  DESCRIPTOR = {
+{%   if struct.constants %}
+    'constants': {
+{%     for constant in struct.constants %}
+      '{{constant|name}}': {{constant.value|expression_to_text}},
+{%     endfor %}
+    },
+{%   endif %}
+{%   if struct.enums %}
+    'enums': {
+{%     for enum in struct.enums %}
+      '{{enum|name}}': {{enum_values(enum)|indent(6)}},
+{%     endfor %}
+    },
+{%   endif %}
+  }
+{% endfor %}