ServiceWorker: Introduce ServiceWorkerMessageEvent to replace MessageEvent (3/3).

Source/modules/serviceworkers/ServiceWorkerMessageEvent.idl

Index: Source/modules/serviceworkers/ServiceWorkerMessageEvent.idl
diff --git a/Source/modules/serviceworkers/ServiceWorkerMessageEvent.idl b/Source/modules/serviceworkers/ServiceWorkerMessageEvent.idl
new file mode 100644
index 0000000000000000000000000000000000000000..07f6d8768b015f3f2c9166d6f0a8d3cd83ea139b
--- /dev/null
+++ b/Source/modules/serviceworkers/ServiceWorkerMessageEvent.idl
@@ -0,0 +1,17 @@
+// 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.
+
+// https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#serviceworkermessage-event-interface
+
+[
+    Constructor(DOMString type, optional ServiceWorkerMessageEventInit eventInitDict),
+    Exposed=(Window, Worker),
+    RuntimeEnabled=ServiceWorker,
+] interface ServiceWorkerMessageEvent : Event {
+    readonly attribute DOMString origin;
+    readonly attribute DOMString lastEventId;
+    readonly attribute (ServiceWorker or MessagePort)? source;
+    [Custom=Getter] readonly attribute any data;

[falken, 2015/06/25 03:49:35]

Can you put these in the same order as the spec, for easier comparison?

[xiang, 2015/06/29 02:32:24]

Done.

+    readonly attribute MessagePort[] ports;

[falken, 2015/06/25 03:49:35]

The spec is "MessagePort[]?"

[haraken, 2015/06/25 04:18:49]

Can we add a test for this?

[xiang, 2015/06/29 02:32:24]

Done.

[xiang, 2015/06/29 02:32:24]

The fast/events/constructors/serviceworker-message-event-constructor.html will
verfiy this change.

+};