Perform CORS access checks on Beacon redirects.

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 61 matching lines @@
     static void sendLinkAuditPing(LocalFrame*, const KURL& pingURL, const KURL& destinationURL);
     static void sendViolationReport(LocalFrame*, const KURL& reportURL, PassRefPtr<FormData> report, ViolationReportType);
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     PingLoader(LocalFrame*, ResourceRequest&, const FetchInitiatorInfo&, StoredCredentials);
 
     static void start(LocalFrame*, ResourceRequest&, const FetchInitiatorInfo&, StoredCredentials = AllowStoredCredentials);
 
+    void dispose();
+
 private:
     virtual void didReceiveResponse(blink::WebURLLoader*, const blink::WebURLResponse&) override;
     virtual void didReceiveData(blink::WebURLLoader*, const char*, int, int) override;
     virtual void didFinishLoading(blink::WebURLLoader*, double, int64_t) override;
     virtual void didFail(blink::WebURLLoader*, const blink::WebURLError&) override;
 
     void timeout(Timer<PingLoader>*);
 
     void didFailLoading(Page*);
 
-    void dispose();
-
     OwnPtr<blink::WebURLLoader> m_loader;
     Timer<PingLoader> m_timeout;
     String m_url;
     unsigned long m_identifier;
 };
 
 }
 
 #endif // PingLoader_h