Mojo C++ bindings: custom type mapping for array - part 2

mojo/public/cpp/bindings/map.h

Index: mojo/public/cpp/bindings/map.h
diff --git a/mojo/public/cpp/bindings/map.h b/mojo/public/cpp/bindings/map.h
index c0735bad6fb53909bd75610653f376b6022a2640..f1cdd41ae7cb923de9724051647dd67951980704 100644
--- a/mojo/public/cpp/bindings/map.h
+++ b/mojo/public/cpp/bindings/map.h
@@ -24,11 +24,14 @@ namespace mojo {
 //   - There can only be one entry per unique key.
 //   - Values of move-only types will be moved into the Map when they are added
 //     using the insert() method.
-template <typename Key, typename Value>
+template <typename K, typename V>
 class Map {
   MOVE_ONLY_TYPE_FOR_CPP_03(Map);
 
  public:
+  using Key = K;
+  using Value = V;
+
   // Map keys cannot be move only classes.
   static_assert(!internal::IsMoveOnlyType<Key>::value,
                 "Map keys cannot be move only types.");