Mojo JS bindings: change module loading solution.

mojo/public/interfaces/bindings/tests/echo_import.mojom

Index: mojo/public/interfaces/bindings/tests/echo_import.mojom
diff --git a/mojo/public/interfaces/bindings/tests/echo_import.mojom b/mojo/public/interfaces/bindings/tests/echo_import.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..a024ce2ff16ff9ee0d0bd63f3964cf4bd409f81e
--- /dev/null
+++ b/mojo/public/interfaces/bindings/tests/echo_import.mojom
@@ -0,0 +1,10 @@
+// Copyright 2017 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.
+
+module test.echo_import.mojom;
+
+struct Point {
+  int32 x;
+  int32 y;
+};