Mojo JS bindings: change module loading solution.

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

Index: mojo/public/interfaces/bindings/tests/echo_service.mojom
diff --git a/mojo/public/interfaces/bindings/tests/echo_service.mojom b/mojo/public/interfaces/bindings/tests/echo_service.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..da8269c8b1f04c68971618fab6eae2cbe2995259
--- /dev/null
+++ b/mojo/public/interfaces/bindings/tests/echo_service.mojom
@@ -0,0 +1,12 @@
+// 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 mojo.test.echo;
+
+import "echo_import.mojom";
+
+interface EchoService {

[Ken Rockot(use gerrit already), 2017/03/20 15:27:20]

nit: Even in spite of other "service" names in test interfaces, would you mind
changing this to not be "EchoService"? Could it just be "Echo"? And could we add
an inner mojom namespace?

[yzshen1, 2017/03/20 17:45:02]

Done. Thanks!

+  EchoPoint(mojo.test.echo_import.Point point)
+      => (mojo.test.echo_import.Point result);
+};