Apply meta tag referrer policy for preloaded requests

Source/core/html/parser/HTMLPreloadScanner.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 49 matching lines @@
 private:
     CachedDocumentParameters(Document*, PassRefPtr<MediaValues>);
 };
 
 class TokenPreloadScanner {
     WTF_MAKE_NONCOPYABLE(TokenPreloadScanner); WTF_MAKE_FAST_ALLOCATED(TokenPreloadScanner);
 public:
     TokenPreloadScanner(const KURL& documentURL, PassOwnPtr<CachedDocumentParameters>);
     ~TokenPreloadScanner();
 
-    void scan(const HTMLToken&, const SegmentedString&, PreloadRequestStream& requests);
-    void scan(const CompactHTMLToken&, const SegmentedString&, PreloadRequestStream& requests);
+    void scan(const HTMLToken&, const SegmentedString&, PreloadRequestStream& requests, String* preloadedReferrerPolicy);
+    void scan(const CompactHTMLToken&, const SegmentedString&, PreloadRequestStream& requests, String* preloadedReferrerPolicy);
 
     void setPredictedBaseElementURL(const KURL& url) { m_predictedBaseElementURL = url; }
 
     // A TokenPreloadScannerCheckpoint is valid until the next call to rewindTo,
     // at which point all outstanding checkpoints are invalidated.
     TokenPreloadScannerCheckpoint createCheckpoint();
     void rewindTo(TokenPreloadScannerCheckpoint);
 
     bool isSafeToSendToAnotherThread()
     {
         return m_documentURL.isSafeToSendToAnotherThread()
             && m_predictedBaseElementURL.isSafeToSendToAnotherThread();
     }
 
 private:
     class StartTagScanner;
 
-    template<typename Token>
-    inline void scanCommon(const Token&, const SegmentedString&, PreloadRequestStream& requests);
+    template <typename Token>
+    inline void scanCommon(const Token&, const SegmentedString&, PreloadRequestStream& requests, String* preloadedReferrerPolicy);
 
     template<typename Token>
     void updatePredictedBaseURL(const Token&);
 
     struct Checkpoint {
         Checkpoint(const KURL& predictedBaseElementURL, bool inStyle, bool isAppCacheEnabled, bool isCSPEnabled, size_t templateCount)
             : predictedBaseElementURL(predictedBaseElementURL)
             , inStyle(inStyle)
             , isAppCacheEnabled(isAppCacheEnabled)
             , isCSPEnabled(isCSPEnabled)
@@ skipping 54 matching lines @@
 private:
     TokenPreloadScanner m_scanner;
     SegmentedString m_source;
     HTMLToken m_token;
     OwnPtr<HTMLTokenizer> m_tokenizer;
 };
 
 }
 
 #endif