Apply meta tag referrer policy for preloaded requests

Source/core/html/parser/CSSPreloadScanner.h

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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:
  * 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
@@ skipping 28 matching lines @@
     WTF_MAKE_NONCOPYABLE(CSSPreloadScanner);
 public:
     CSSPreloadScanner();
     ~CSSPreloadScanner();
 
     void reset();
 
     void scan(const HTMLToken::DataVector&, const SegmentedString&, PreloadRequestStream&);
     void scan(const String&, const SegmentedString&, PreloadRequestStream&);
 
+    void setReferrerPolicy(const ReferrerPolicy);
+
 private:
     enum State {
         Initial,
         MaybeComment,
         Comment,
         MaybeCommentEnd,
         RuleStart,
         Rule,
         AfterRule,
         RuleValue,
         AfterRuleValue,
         DoneParsingImportRules,
     };
 
     template<typename Char>
     void scanCommon(const Char* begin, const Char* end, const SegmentedString&, PreloadRequestStream&);
 
     inline void tokenize(UChar, const SegmentedString&);
     void emitRule(const SegmentedString&);
 
     State m_state;
     StringBuilder m_rule;
     StringBuilder m_ruleValue;
 
     // Only non-zero during scan()
     PreloadRequestStream* m_requests;
+
+    ReferrerPolicy m_referrerPolicy;
 };
 
 }
 
 #endif