[WIP] Implement Notifications through Platform instead of WebFrame.

Source/modules/notifications/NotificationClient.h

-/*
- * Copyright (C) 2009 Google Inc. All rights reserved.
- * Copyright (C) 2011, 2012 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:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * 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.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef NotificationClient_h
-#define NotificationClient_h
-
-#include "core/html/VoidCallback.h"
-#include "modules/notifications/NotificationPermissionCallback.h"
-#include "wtf/PassOwnPtr.h"
-
-namespace blink {
-
-class ExecutionContext;
-class Notification;
-
-class NotificationClient {
-
-public:
-    virtual ~NotificationClient() { }
-
-    enum Permission {
-        PermissionAllowed, // User has allowed notifications
-        PermissionNotAllowed, // User has not yet allowed
-        PermissionDenied // User has explicitly denied permission
-    };
-
-    // Requests that a notification be shown.
-    virtual bool show(Notification*) = 0;
-
-    // Requests that a notification that has already been shown be closed.
-    virtual void close(Notification*) = 0;
-
-    // Informs the presenter that a Notification object has been destroyed
-    // (such as by a page transition). The presenter may continue showing
-    // the notification, but must not attempt to call the event handlers.
-    virtual void notificationObjectDestroyed(Notification*) = 0;
-
-    // Checks the current level of permission.
-    virtual Permission checkPermission(ExecutionContext*) = 0;
-};
-
-} // namespace blink
-
-#endif // NotificationClient_h