Revert of Remove support for legacy WebKit Notifications

Source/modules/notifications/DOMWindowNotifications.cpp

Index: Source/modules/notifications/DOMWindowNotifications.cpp
diff --git a/Source/modules/notifications/DOMWindowNotifications.cpp b/Source/modules/notifications/DOMWindowNotifications.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..65790d96982b9c78aa148156f514a9a64e1e09db
--- /dev/null
+++ b/Source/modules/notifications/DOMWindowNotifications.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2006, 2007, 2008, 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.
+ */
+
+#include "config.h"
+#include "modules/notifications/DOMWindowNotifications.h"
+
+#if ENABLE(LEGACY_NOTIFICATIONS)
+
+#include "core/dom/Document.h"
+#include "core/frame/DOMWindow.h"
+#include "core/page/Page.h"
+#include "modules/notifications/NotificationCenter.h"
+#include "modules/notifications/NotificationController.h"
+
+namespace WebCore {
+
+DOMWindowNotifications::DOMWindowNotifications(DOMWindow& window)
+    : DOMWindowProperty(window.frame())
+    , m_window(window)
+{
+}
+
+DOMWindowNotifications::~DOMWindowNotifications()
+{
+}
+
+const char* DOMWindowNotifications::supplementName()
+{
+    return "DOMWindowNotifications";
+}
+
+DOMWindowNotifications& DOMWindowNotifications::from(DOMWindow& window)
+{
+    DOMWindowNotifications* supplement = static_cast<DOMWindowNotifications*>(Supplement<DOMWindow>::from(window, supplementName()));
+    if (!supplement) {
+        supplement = new DOMWindowNotifications(window);
+        Supplement<DOMWindow>::provideTo(window, supplementName(), adoptPtr(supplement));
+    }
+    return *supplement;
+}
+
+NotificationCenter* DOMWindowNotifications::webkitNotifications(DOMWindow& window)
+{
+    return DOMWindowNotifications::from(window).webkitNotifications();
+}
+
+void DOMWindowNotifications::willDestroyGlobalObjectInFrame()
+{
+    m_notificationCenter = nullptr;
+    DOMWindowProperty::willDestroyGlobalObjectInFrame();
+}
+
+void DOMWindowNotifications::willDetachGlobalObjectFromFrame()
+{
+    m_notificationCenter = nullptr;
+    DOMWindowProperty::willDetachGlobalObjectFromFrame();
+}
+
+NotificationCenter* DOMWindowNotifications::webkitNotifications()
+{
+    if (!m_window.isCurrentlyDisplayedInFrame())
+        return 0;
+
+    if (m_notificationCenter)
+        return m_notificationCenter.get();
+
+    Document* document = m_window.document();
+    if (!document)
+        return 0;
+
+    Page* page = document->page();
+    if (!page)
+        return 0;
+
+    NotificationClient* provider = NotificationController::clientFrom(page);
+    if (provider)
+        m_notificationCenter = NotificationCenter::create(document, provider);
+
+    return m_notificationCenter.get();
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(LEGACY_NOTIFICATIONS)