Revert "Push API: define push event on Service Worker."

Source/modules/push_messaging/PushEvent.h

-// 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 "modules/EventModules.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