CSP 1.1: Remove last bits of 'X-WebKit-CSP'.

Source/core/frame/ContentSecurityPolicyResponseHeaders.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:
  * 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 21 matching lines @@
 
 class ResourceResponse;
 
 class ContentSecurityPolicyResponseHeaders {
 public:
     ContentSecurityPolicyResponseHeaders() { }
     explicit ContentSecurityPolicyResponseHeaders(const ResourceResponse&);
 
     const String& contentSecurityPolicy() const { return m_contentSecurityPolicy; }
     const String& contentSecurityPolicyReportOnly() const { return m_contentSecurityPolicyReportOnly; }
-    const String& xWebKitCSP() const { return m_xWebKitCSP; }
-    const String& xWebKitCSPReportOnly() const { return m_xWebKitCSPReportOnly; }
 
 private:
     String m_contentSecurityPolicy;
     String m_contentSecurityPolicyReportOnly;
-    String m_xWebKitCSP;
-    String m_xWebKitCSPReportOnly;
 };
 
 }
 
 #endif