Revert of Remove support for legacy WebKit Notifications

Source/modules/notifications/DOMWindowNotifications.h

Index: Source/modules/notifications/DOMWindowNotifications.h
diff --git a/Source/modules/notifications/DOMWindowNotifications.h b/Source/modules/notifications/DOMWindowNotifications.h
new file mode 100644
index 0000000000000000000000000000000000000000..f9a19f23ed33321050338420f6cfdefa5f65e609
--- /dev/null
+++ b/Source/modules/notifications/DOMWindowNotifications.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef DOMWindowNotifications_h
+#define DOMWindowNotifications_h
+
+#if ENABLE(LEGACY_NOTIFICATIONS)
+
+#include "core/frame/DOMWindowProperty.h"
+#include "heap/Handle.h"
+#include "platform/Supplementable.h"
+#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+
+class DOMWindow;
+class NotificationCenter;
+
+class DOMWindowNotifications FINAL : public Supplement<DOMWindow>, public DOMWindowProperty {
+public:
+    virtual ~DOMWindowNotifications();
+
+    static NotificationCenter* webkitNotifications(DOMWindow&);
+    static DOMWindowNotifications& from(DOMWindow&);
+
+    virtual void willDestroyGlobalObjectInFrame() OVERRIDE;
+    virtual void willDetachGlobalObjectFromFrame() OVERRIDE;
+
+private:
+    explicit DOMWindowNotifications(DOMWindow&);
+
+    NotificationCenter* webkitNotifications();
+    static const char* supplementName();
+
+    DOMWindow& m_window;
+    RefPtrWillBePersistent<NotificationCenter> m_notificationCenter;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(LEGACY_NOTIFICATIONS)
+
+#endif // DOMWindowNotifications_h