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

Source/modules/serviceworkers/ServiceWorkerMessageEvent.cpp

+// 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.
+
+#include "config.h"
+#include "modules/serviceworkers/ServiceWorkerMessageEvent.h"
+
+namespace blink {
+
+ServiceWorkerMessageEvent::ServiceWorkerMessageEvent()
+{
+}
+
+ServiceWorkerMessageEvent::ServiceWorkerMessageEvent(const AtomicString& type, const ServiceWorkerMessageEventInit& initializer)
+    : Event(type, initializer)
+    , m_origin(initializer.origin())

[bashi, 2015/05/22 00:23:36]

You can't use initializer.origin() without checking initializer.hasOrigin()
since ServiceWorkerMessageEventInit doesn't have default value for "origin".

Or, you can ask the spec authors to consider providing default values like
CustomEventInit.
https://dom.spec.whatwg.org/#interface-customevent

[xiang, 2015/05/25 02:04:25]

Done.

+    , m_lastEventId(initializer.lastEventId())

[bashi, 2015/05/22 00:23:36]

Ditto.

[xiang, 2015/05/25 02:04:25]

Done.

+    , m_source(initializer.source())

[bashi, 2015/05/22 00:23:36]

Ditto.

[xiang, 2015/05/25 02:04:25]

Done.

+    , m_ports(adoptPtrWillBeNoop(new MessagePortArray(initializer.ports())))

[bashi, 2015/05/22 00:23:36]

Ditto.

[xiang, 2015/05/25 02:04:25]

Done.

+{
+    if (initializer.hasData())
+        m_data = initializer.data();
+}
+
+ServiceWorkerMessageEvent::ServiceWorkerMessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, const ServiceWorkerOrMessagePort& source, PassOwnPtrWillBeRawPtr<MessagePortArray> ports)
+    : Event(EventTypeNames::message, false, false)
+    , m_serializedData(data)
+    , m_origin(origin)
+    , m_lastEventId(lastEventId)
+    , m_source(source)
+    , m_ports(ports)
+{
+    if (m_serializedData)
+        m_serializedData->registerMemoryAllocatedWithCurrentScriptContext();
+}
+
+ServiceWorkerMessageEvent::~ServiceWorkerMessageEvent()
+{
+}
+
+const AtomicString& ServiceWorkerMessageEvent::interfaceName() const
+{
+    return EventNames::ServiceWorkerMessageEvent;
+}
+
+DEFINE_TRACE(ServiceWorkerMessageEvent)
+{
+#if ENABLE(OILPAN)
+    visitor->trace(m_ports);
+#endif
+    Event::trace(visitor);
+}
+
+} // namespace blink