mojo: Generate top level enums for python bindings.

mojo/public/tools/bindings/generators/mojom_python_generator.py

Index: mojo/public/tools/bindings/generators/mojom_python_generator.py
diff --git a/mojo/public/tools/bindings/generators/mojom_python_generator.py b/mojo/public/tools/bindings/generators/mojom_python_generator.py
index ca9625ebc784a3c77d17c89028d31f1dde1fda82..37d39589ad929ff19540e089417ea21924e134ea 100644
--- a/mojo/public/tools/bindings/generators/mojom_python_generator.py
+++ b/mojo/public/tools/bindings/generators/mojom_python_generator.py
@@ -34,15 +34,18 @@ def ConstantStyle(name):
   return '_'.join([x.upper() for x in components])
 
 def GetNameForElement(element):
+  if isinstance(element,  mojom.EnumValue):
+    return (UpperCamelCase(element.enum_name) + '.' +
+            ConstantStyle(element.name))
   if isinstance(element, (mojom.NamedValue,
                           mojom.Constant)):
     return ConstantStyle(element.name)
   raise Exception('Unexpected element: ' % element)
 
-def TranslateConstants(token):
+def ExpressionToText(token):
   if isinstance(token, (mojom.EnumValue, mojom.NamedValue)):
     # Both variable and enum constants are constructed like:
-    # NamespaceUid.Struct[.Enum].CONSTANT_NAME
+    # PythonModule[.Struct][.Enum].CONSTANT_NAME
     name = []
     if token.imported_from:
       name.append(token.imported_from['python_module'])
@@ -51,7 +54,7 @@ def TranslateConstants(token):
     if isinstance(token, mojom.EnumValue):
       name.append(GetNameForElement(token))
     else:
-      name.append(token.name)
+      name.append(GetNameForElement(token))
     return '.'.join(name)
 
   if isinstance(token, mojom.BuiltinValue):
@@ -66,10 +69,6 @@ def TranslateConstants(token):
   return token
 
 
-def ExpressionToText(value):
-  return TranslateConstants(value)
-
-
 class Generator(generator.Generator):
 
   python_filters = {
@@ -81,6 +80,7 @@ class Generator(generator.Generator):
   def GeneratePythonModule(self):
     return {
       'imports': self.GetImports(),
+      'enums': self.module.enums,
       'module': self.module,
     }