Mojo: Simplify typemap usage.

mojo/public/cpp/bindings/tests/rect_blink.typemap

Index: mojo/public/cpp/bindings/tests/rect_blink.typemap
diff --git a/mojo/public/cpp/bindings/tests/rect_blink.typemap b/mojo/public/cpp/bindings/tests/rect_blink.typemap
new file mode 100644
index 0000000000000000000000000000000000000000..37ee409edf100caaf609a7f1cc18dd4a25edf769
--- /dev/null
+++ b/mojo/public/cpp/bindings/tests/rect_blink.typemap
@@ -0,0 +1,9 @@
+# Copyright 2015 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 = "//mojo/public/interfaces/bindings/tests/rect.mojom"
+public_headers = [ "//mojo/public/cpp/bindings/tests/rect_blink.h" ]
+traits_headers = [ "//mojo/public/cpp/bindings/tests/rect_blink_traits.h" ]
+
+type_mappings = [ "mojo.test.TypemappedRect=mojo::test::RectBlink" ]