Mojo JS bindings: change module loading solution.

mojo/public/interfaces/bindings/tests/sample_import2.mojom

 // Copyright 2014 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.
 
 [JavaPackage="org.chromium.mojo.bindings.test.mojom.imported"]
 module imported;
 
 import "sample_import.mojom";
 
 // This sample adds more types and constants to the "imported" namespace,
 // to test a bug with importing multiple modules with the same namespace.
 
 enum Color {
   RED,
   BLACK,
 };
 
 struct Size {
   int32 width;
   int32 height;
 };
 
 struct Thing {
   imported.Shape shape = RECTANGLE;
   imported.Color color = Color.BLACK;
   Point location;
   Size size;
 };
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