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

Source/modules/push_messaging/PushEvent.cpp

Index: Source/modules/push_messaging/PushEvent.cpp
diff --git a/Source/modules/push_messaging/PushEvent.cpp b/Source/modules/push_messaging/PushEvent.cpp
deleted file mode 100644
index 6e54fa6f5b8f6acd9baf2c02e76766dffb6d4559..0000000000000000000000000000000000000000
--- a/Source/modules/push_messaging/PushEvent.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-// 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.
-
-#include "config.h"
-#include "modules/push_messaging/PushEvent.h"
-
-namespace WebCore {
-
-PushEventInit::PushEventInit()
-{
-}
-
-PushEvent::PushEvent()
-{
-    ScriptWrappable::init(this);
-}
-
-PushEvent::PushEvent(const AtomicString& type, const String& data)
-    : Event(type, /*canBubble=*/false, /*cancelable=*/false)
-    , m_data(data)
-{
-    ScriptWrappable::init(this);
-}
-
-PushEvent::PushEvent(const AtomicString& type, const PushEventInit& initializer)
-    : Event(type, initializer)
-    , m_data(initializer.data)
-{
-    ScriptWrappable::init(this);
-}
-
-PushEvent::~PushEvent()
-{
-}
-
-const AtomicString& PushEvent::interfaceName() const
-{
-    return EventNames::PushEvent;
-}
-
-} // namespace WebCore