Simplify CachedResource::data

Source/WebCore/loader/cache/CachedTextTrack.h

 /*
  * Copyright (C) 2011 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
@@ skipping 18 matching lines @@
 #include "CachedResource.h"
 #include "FontOrientation.h"
 
 namespace WebCore {
 
 class CachedTextTrack : public CachedResource {
 public:
     CachedTextTrack(const ResourceRequest&);
     virtual ~CachedTextTrack();
 
-    virtual void data(PassRefPtr<ResourceBuffer> data, bool allDataReceived);
+    virtual void data(PassRefPtr<ResourceBuffer> data) OVERRIDE;
 };
 
 }
 
 #endif