Generalize validation of developer input for Web Notifications

Source/modules/notifications/NotificationData.h

+// Copyright 2015 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 NotificationData_h
+#define NotificationData_h
+
+#include "modules/ModulesExport.h"
+#include "public/platform/modules/notifications/WebNotificationData.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class ExceptionState;
+class ExecutionContext;
+class NotificationOptions;
+
+// Creates a WebNotificationData object based on the developer-provided notification data. When the
+// data is deemed invalid, an exception will be thrown to the passed exception state.
+MODULES_EXPORT WebNotificationData createWebNotificationData(ExecutionContext*, const String& title, const NotificationOptions&, ExceptionState&);
+
+} // namespace blink
+
+#endif // NotificationData_h