Update fetch / loader classes to use OVERRIDE / FINAL when needed

Source/core/loader/PingLoader.h

 /*
  * Copyright (C) 2010 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 35 matching lines @@
 class ResourceError;
 class ResourceHandle;
 class ResourceRequest;
 class ResourceResponse;
 
 // This class triggers asynchronous loads independent of Frame staying alive (i.e., auditing pingbacks).
 // Since nothing depends on resources loaded through this class, we just want
 // to allow the load to live long enough to ensure the message was actually sent.
 // Therefore, as soon as a callback is received from the ResourceHandle, this class
 // will cancel the load and delete itself.
-class PingLoader : private blink::WebURLLoaderClient {
+class PingLoader FINAL : private blink::WebURLLoaderClient {
     WTF_MAKE_NONCOPYABLE(PingLoader); WTF_MAKE_FAST_ALLOCATED;
 public:
     enum ViolationReportType {
         ContentSecurityPolicyViolationReport,
         XSSAuditorViolationReport
     };
 
     static void loadImage(Frame*, const KURL& url);
     static void sendPing(Frame*, const KURL& pingURL, const KURL& destinationURL);
     static void sendViolationReport(Frame*, const KURL& reportURL, PassRefPtr<FormData> report, ViolationReportType);
 
     virtual ~PingLoader();
 
 private:
     PingLoader(Frame*, ResourceRequest&, StoredCredentials = AllowStoredCredentials);
 
     virtual void didReceiveResponse(blink::WebURLLoader*, const blink::WebURLResponse&) OVERRIDE { delete this; }
     virtual void didReceiveData(blink::WebURLLoader*, const char*, int, int) OVERRIDE { delete this; }
     virtual void didFinishLoading(blink::WebURLLoader*, double) OVERRIDE { delete this; }
     virtual void didFail(blink::WebURLLoader*, const blink::WebURLError&) OVERRIDE { delete this; }
     void timeout(Timer<PingLoader>*) { delete this; }
 
     OwnPtr<blink::WebURLLoader> m_loader;
     Timer<PingLoader> m_timeout;
 };
 
 }
 
 #endif