Push API: define push event on Service Worker.

Source/modules/push_messaging/PushEvent.h

Index: Source/modules/push_messaging/PushEvent.h
diff --git a/Source/modules/push_messaging/PushEvent.h b/Source/modules/push_messaging/PushEvent.h
new file mode 100644
index 0000000000000000000000000000000000000000..0948c3e938aee649e369aae5a0f4b6e869eb62cc
--- /dev/null
+++ b/Source/modules/push_messaging/PushEvent.h
@@ -0,0 +1,51 @@
+// 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.
+
+#ifndef PushEvent_h
+#define PushEvent_h
+
+#include "core/events/Event.h"
+#include "platform/heap/Handle.h"
+#include "wtf/text/AtomicString.h"
+#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+
+struct PushEventInit : public EventInit {
+    PushEventInit();
+
+    String data;
+};
+
+class PushEvent FINAL : public Event {
+public:
+    static PassRefPtrWillBeRawPtr<PushEvent> create()
+    {
+        return adoptRefWillBeNoop(new PushEvent);
+    }
+    static PassRefPtrWillBeRawPtr<PushEvent> create(const AtomicString& type, const String& data)
+    {
+        return adoptRefWillBeNoop(new PushEvent(type, data));
+    }
+    static PassRefPtrWillBeRawPtr<PushEvent> create(const AtomicString& type, const PushEventInit& initializer)
+    {
+        return adoptRefWillBeNoop(new PushEvent(type, initializer));
+    }
+
+    virtual ~PushEvent();
+
+    virtual const AtomicString& interfaceName() const OVERRIDE;
+
+    String data() const { return m_data; }
+
+private:
+    PushEvent();
+    PushEvent(const AtomicString& type, const String& data);
+    PushEvent(const AtomicString& type, const PushEventInit&);
+    String m_data;
+};
+
+} // namespace WebCore
+
+#endif // PushEvent_h