Set proper referrer for css resource fetching

Source/core/css/CSSFontFaceSrcValue.cpp

 /*
  * Copyright (C) 2007, 2010 Apple 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 87 matching lines @@
 }
 
 FontResource* CSSFontFaceSrcValue::fetch(Document* document)
 {
     if (!m_fetched || m_fetched->isCORSFailed()) {
         FetchRequest request(ResourceRequest(document->completeURL(m_resource)), FetchInitiatorTypeNames::css);
         SecurityOrigin* securityOrigin = document->securityOrigin();
         if (shouldSetCrossOriginAccessControl(request.url(), securityOrigin)) {
             request.setCrossOriginAccessControl(securityOrigin, DoNotAllowStoredCredentials);
         }
+        if (!m_referrer.isEmpty())
+            request.mutableResourceRequest().setHTTPReferrer(Referrer(m_referrer, ReferrerPolicyDefault));
+
         m_fetched = document->fetcher()->fetchFont(request);
     }
     return m_fetched.get();
 }
 
 bool CSSFontFaceSrcValue::equals(const CSSFontFaceSrcValue& other) const
 {
     return m_isLocal == other.m_isLocal && m_format == other.m_format && m_resource == other.m_resource;
 }
 
 }