[mojo-bindings] Support reuse of native enum classes

components/mus/public/interfaces/BUILD.gn

 # 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/public/tools/bindings/mojom.gni")
 
 mojom("interfaces") {
   sources = [
     "accelerator_registrar.mojom",
     "command_buffer.mojom",
@@ skipping 13 matching lines @@
     "window_manager_constants.mojom",
     "window_tree.mojom",
     "window_tree_host.mojom",
   ]
 
   import_dirs = [
     get_path_info("../../../..", "abspath"),
     "//mojo/services",
   ]
 
-  deps = [
+  public_deps = [
     "//ui/mojo/geometry:interfaces",
     "//ui/mojo/ime:interfaces",
   ]
+
+  typemaps = [
+    "cc.typemap",
+    "gpu.typemap",
+  ]
+
+  typemap_deps = [
+    "//cc",
+    "//gpu/command_buffer/common",
+  ]
 }