Implement onunhandledrejection / onrejectionhandled events

Source/core/events/PromiseRejectionEvent.cpp

Index: Source/core/events/PromiseRejectionEvent.cpp
diff --git a/Source/core/events/PromiseRejectionEvent.cpp b/Source/core/events/PromiseRejectionEvent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..17bb08b177e75014bdce963d50a2217400728d25
--- /dev/null
+++ b/Source/core/events/PromiseRejectionEvent.cpp
@@ -0,0 +1,38 @@
+// 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 "core/events/PromiseRejectionEvent.h"
+
+namespace blink {
+
+PromiseRejectionEvent::PromiseRejectionEvent()
+{
+}
+
+PromiseRejectionEvent::PromiseRejectionEvent(const AtomicString& type, const PromiseRejectionEventInit& initializer)
+    : Event(type, initializer)
+    , m_reason(initializer.reason())
+{
+    if (initializer.hasPromise())
+        m_promise = initializer.promise();
+}
+
+PromiseRejectionEvent::~PromiseRejectionEvent()
+{
+}
+
+
+const AtomicString& PromiseRejectionEvent::interfaceName() const
+{
+    return EventNames::PromiseRejectionEvent;
+}
+
+DEFINE_TRACE(PromiseRejectionEvent)
+{
+    Event::trace(visitor);
+}
+
+} // namespace blink