Apply meta tag referrer policy for preloaded requests

Source/core/html/parser/CSSPreloadScanner.cpp

 /*
  * Copyright (C) 2008, 2010 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009 Torch Mobile, Inc. http://www.torchmobile.com/
  * 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.
@@ skipping 19 matching lines @@
 
 #include "core/fetch/FetchInitiatorTypeNames.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "platform/text/SegmentedString.h"
 
 namespace blink {
 
 CSSPreloadScanner::CSSPreloadScanner()
     : m_state(Initial)
     , m_requests(0)
+    , m_referrerPolicy(ReferrerPolicyDefault)
 {
 }
 
 CSSPreloadScanner::~CSSPreloadScanner()
 {
 }
 
 void CSSPreloadScanner::reset()
 {
     m_state = Initial;
@@ skipping 19 matching lines @@
 {
     if (tagName.is8Bit()) {
         const LChar* begin = tagName.characters8();
         scanCommon(begin, begin + tagName.length(), source, requests);
         return;
     }
     const UChar* begin = tagName.characters16();
     scanCommon(begin, begin + tagName.length(), source, requests);
 }
 
+void CSSPreloadScanner::setReferrerPolicy(const ReferrerPolicy policy)
+{
+    m_referrerPolicy = policy;
+}
+
 inline void CSSPreloadScanner::tokenize(UChar c, const SegmentedString& source)
 {
     // We are just interested in @import rules, no need for real tokenization here
     // Searching for other types of resources is probably low payoff.
     switch (m_state) {
     case Initial:
         if (isHTMLSpace<UChar>(c))
             break;
         if (c == '@')
             m_state = RuleStart;
@@ skipping 119 matching lines @@
     return string.substring(offset, reducedLength);
 }
 
 void CSSPreloadScanner::emitRule(const SegmentedString& source)
 {
     if (equalIgnoringCase(m_rule, "import")) {
         String url = parseCSSStringOrURL(m_ruleValue.toString());
         if (!url.isEmpty()) {
             KURL baseElementURL; // FIXME: This should be passed in from the HTMLPreloadScaner via scan()!
             TextPosition position = TextPosition(source.currentLine(), source.currentColumn());
-            OwnPtr<PreloadRequest> request = PreloadRequest::create(FetchInitiatorTypeNames::css, position, url, baseElementURL, Resource::CSSStyleSheet);
+            OwnPtr<PreloadRequest> request = PreloadRequest::create(FetchInitiatorTypeNames::css, position, url, baseElementURL, Resource::CSSStyleSheet, m_referrerPolicy);
             // FIXME: Should this be including the charset in the preload request?
             m_requests->append(request.release());
         }
         m_state = Initial;
     } else if (equalIgnoringCase(m_rule, "charset"))
         m_state = Initial;
     else
         m_state = DoneParsingImportRules;
     m_rule.clear();
     m_ruleValue.clear();
 }
 
 }