Add mojom for WindowOpenDisposition

ui/base/mojo/window_open_disposition.typemap

Index: ui/base/mojo/window_open_disposition.typemap
diff --git a/ui/base/mojo/window_open_disposition.typemap b/ui/base/mojo/window_open_disposition.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..9c4991d15952157ac74783360eadc3c21de10ac9
--- /dev/null
+++ b/ui/base/mojo/window_open_disposition.typemap
@@ -0,0 +1,12 @@
+# Copyright 2016 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.
+
+mojom = "//ui/base/mojo/window_open_disposition.mojom"
+public_headers = [ "//ui/base/window_open_disposition.h" ]
+public_deps = [
+  "//mojo/public/cpp/bindings",
+  "//ui/base",
+]
+traits_headers = [ "//ui/base/mojo/window_open_disposition_enum_traits.h" ]
+type_mappings = [ "ui.mojom.WindowOpenDisposition=WindowOpenDisposition" ]