ServiceWorker: Add initial implementation of ExtendableMessageEvent behind a flag

third_party/WebKit/Source/modules/serviceworkers/ExtendableMessageEvent.cpp

+// Copyright 2016 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 "modules/serviceworkers/ExtendableMessageEvent.h"
+
+namespace blink {
+
+PassRefPtrWillBeRawPtr<ExtendableMessageEvent> ExtendableMessageEvent::create()
+{
+    return adoptRefWillBeNoop(new ExtendableMessageEvent);
+}
+
+PassRefPtrWillBeRawPtr<ExtendableMessageEvent> ExtendableMessageEvent::create(const AtomicString& type, const ExtendableMessageEventInit& initializer)
+{
+    return adoptRefWillBeNoop(new ExtendableMessageEvent(type, initializer));
+}
+
+PassRefPtrWillBeRawPtr<ExtendableMessageEvent> ExtendableMessageEvent::create(const AtomicString& type, const ExtendableMessageEventInit& initializer, WaitUntilObserver* observer)
+{
+    return adoptRefWillBeNoop(new ExtendableMessageEvent(type, initializer, observer));
+}
+
+const AtomicString& ExtendableMessageEvent::interfaceName() const
+{
+    return EventNames::ExtendableMessageEvent;
+}
+
+DEFINE_TRACE(ExtendableMessageEvent)
+{
+    ExtendableEvent::trace(visitor);
+}
+
+ExtendableMessageEvent::ExtendableMessageEvent()
+{
+}
+
+ExtendableMessageEvent::ExtendableMessageEvent(const AtomicString& type, const ExtendableMessageEventInit& initializer)
+    : ExtendableMessageEvent(type, initializer, nullptr)
+{
+}
+
+ExtendableMessageEvent::ExtendableMessageEvent(const AtomicString& type, const ExtendableMessageEventInit& initializer, WaitUntilObserver* observer)
+    : ExtendableEvent(type, initializer, observer)
+{
+    // TODO(nhiroki): Set attributes (crbug.com/543198).
+}
+
+} // namespace blink