Create response_parameters as part of mojom

mojo/public/bindings/pylib/generate/mojom_data.py

Index: mojo/public/bindings/pylib/generate/mojom_data.py
diff --git a/mojo/public/bindings/pylib/generate/mojom_data.py b/mojo/public/bindings/pylib/generate/mojom_data.py
index 9a575a806f863f23f7075c9573f1c85fff214dea..1eb05ebe857a81c90dec5490dd993db9534af638 100644
--- a/mojo/public/bindings/pylib/generate/mojom_data.py
+++ b/mojo/public/bindings/pylib/generate/mojom_data.py
@@ -133,6 +133,9 @@ def MethodToData(method):
   }
   if method.ordinal != None:
     data[istr(2, 'ordinal')] = method.ordinal
+  if method.response_parameters != None:
+    data[istr(3, 'response_parameters')] = map(
+        ParameterToData, method.response_parameters)
   return data
 
 def MethodFromData(kinds, data):
@@ -142,6 +145,10 @@ def MethodFromData(kinds, data):
   method.default = data.get('default')
   method.parameters = map(
       lambda parameter: ParameterFromData(kinds, parameter), data['parameters'])
+  if data.has_key('response_parameters'):
+    method.response_parameters = map(
+        lambda parameter: ParameterFromData(kinds, parameter),
+                          data['response_parameters'])
   return method
 
 def InterfaceToData(interface):
@@ -195,9 +202,10 @@ def ModuleFromData(data):
   module.namespace = data['namespace']
   # Imports must come first, because they add to module.kinds which is used
   # by by the others.
-  module.imports = map(
-      lambda import_data: ImportFromData(module, import_data),
-      data['imports'])
+  if data.has_key('imports'):
+    module.imports = map(
+        lambda import_data: ImportFromData(module, import_data),
+        data['imports'])
   module.structs = map(
       lambda struct: StructFromData(module, struct), data['structs'])
   module.interfaces = map(