Move Notification-related Blink API headers into their own directory.

Source/modules/notifications/Notification.h

 /*
  * Copyright (C) 2013 Google 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
@@ skipping 19 matching lines @@
 
 #ifndef Notification_h
 #define Notification_h
 
 #include "core/dom/ActiveDOMObject.h"
 #include "modules/EventTargetModules.h"
 #include "platform/AsyncMethodRunner.h"
 #include "platform/heap/Handle.h"
 #include "platform/text/TextDirection.h"
 #include "platform/weborigin/KURL.h"
-#include "public/platform/WebNotificationDelegate.h"
-#include "public/platform/WebNotificationPermission.h"
+#include "public/platform/modules/notifications/WebNotificationDelegate.h"
+#include "public/platform/modules/notifications/WebNotificationPermission.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class ExecutionContext;
 class NotificationOptions;
 class NotificationPermissionCallback;
 struct WebNotificationData;
 
@@ skipping 96 matching lines @@
     void setState(NotificationState state) { m_state = state; }
 
     NotificationState m_state;
 
     AsyncMethodRunner<Notification> m_asyncRunner;
 };
 
 } // namespace blink
 
 #endif // Notification_h