[mojo-bindings] Support reuse of native enum classes

components/mus/public/interfaces/cc.typemap

Index: components/mus/public/interfaces/cc.typemap
diff --git a/chrome/browser/chromeos/login/ui/login_display_host.cc b/components/mus/public/interfaces/cc.typemap
similarity index 50%
copy from chrome/browser/chromeos/login/ui/login_display_host.cc
copy to components/mus/public/interfaces/cc.typemap
index 11e048fbdfe17dfae293f26a4793318861da64be..d8c834994271a3182352fcc29ae0654f8b3b1633 100644
--- a/chrome/browser/chromeos/login/ui/login_display_host.cc
+++ b/components/mus/public/interfaces/cc.typemap
@@ -2,10 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/chromeos/login/ui/login_display_host.h"
-
-namespace chromeos {
-
-// static
-LoginDisplayHost* LoginDisplayHost::default_host_ = nullptr;
+{
+  "c++": {
+    "mus.mojom.ResourceFormat": {
+      "typename": "cc::ResourceFormat",
+      "headers": [
+        "cc/resources/resource_format.h"
+      ]
+    }
+  }
 }