Add Module and Application interfaces

sky/engine/core/app/AbstractModule.idl

Index: sky/engine/core/app/AbstractModule.idl
diff --git a/sky/engine/core/app/AbstractModule.idl b/sky/engine/core/app/AbstractModule.idl
new file mode 100644
index 0000000000000000000000000000000000000000..50f64383ebd20f3f724774c82dd4503c3be48230
--- /dev/null
+++ b/sky/engine/core/app/AbstractModule.idl
@@ -0,0 +1,12 @@
+// 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.
+
+interface AbstractModule : EventTarget {
+    readonly attribute Document document;
+    readonly attribute DOMString url;
+
+    // FIXME:
+    // readonly attribute Element? currentScript;
+    // Promise<any> import(DOMString url);
+};