Revert "Generate some of the C++ bindings for mojom tagged unions."

mojo/public/tools/bindings/pylib/mojom/parse/translate.py

 # 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.
 
 """Translates parse tree to Mojom IR."""
 
 
 from . import ast
 
 
@@ skipping 134 matching lines @@
 
     assert isinstance(tree, ast.Mojom)
     self.mojom['name'] = name
     self.mojom['namespace'] = tree.module.name[1] if tree.module else ''
     self.mojom['imports'] = \
         [{'filename': imp.import_filename} for imp in tree.import_list]
     self.mojom['attributes'] = \
         _AttributeListToDict(tree.module.attribute_list) if tree.module else {}
     self.mojom['structs'] = \
         _MapTreeForType(StructToDict, tree.definition_list, ast.Struct)
-    self.mojom['unions'] = \
+    self.mojom['union'] = \
         _MapTreeForType(UnionToDict, tree.definition_list, ast.Union)
     self.mojom['interfaces'] = \
         _MapTreeForType(InterfaceToDict, tree.definition_list, ast.Interface)
     self.mojom['enums'] = \
         _MapTreeForType(_EnumToDict, tree.definition_list, ast.Enum)
     self.mojom['constants'] = \
         _MapTreeForType(_ConstToDict, tree.definition_list, ast.Const)
     return self.mojom
 
 
 def Translate(tree, name):
   return _MojomBuilder().Build(tree, name)