Revert of Remove support for legacy WebKit Notifications

Source/modules/notifications/WorkerGlobalScopeNotifications.idl

Index: Source/modules/notifications/WorkerGlobalScopeNotifications.idl
diff --git a/Source/modules/notifications/WorkerGlobalScopeNotifications.idl b/Source/modules/notifications/WorkerGlobalScopeNotifications.idl
new file mode 100644
index 0000000000000000000000000000000000000000..932dcfba8c954a2d2cc727f2d94fff52b5ea71d6
--- /dev/null
+++ b/Source/modules/notifications/WorkerGlobalScopeNotifications.idl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ *
+ * 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.
+ *
+ */
+
+[
+    Conditional=LEGACY_NOTIFICATIONS,
+    RuntimeEnabled=Notifications,
+] partial interface WorkerGlobalScope {
+    readonly attribute NotificationCenter webkitNotifications;
+};