Make generateReferrerHeader() return a Referrer instead of a String

Source/platform/network/ResourceRequest.cpp

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2009, 2012 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 168 matching lines @@
 void ResourceRequest::setHTTPHeaderField(const AtomicString& name, const AtomicString& value)
 {
     m_httpHeaderFields.set(name, value);
 }
 
 void ResourceRequest::setHTTPHeaderField(const char* name, const AtomicString& value)
 {
     setHTTPHeaderField(AtomicString(name), value);
 }
 
+void ResourceRequest::setHTTPReferrer(const Referrer& referrer)
+{
+    if (referrer.referrer.isEmpty())
+        m_httpHeaderFields.remove("Referer");
+    else
+        setHTTPHeaderField("Referer", referrer.referrer);
+    m_referrerPolicy = referrer.referrerPolicy;
+}
+
 void ResourceRequest::clearHTTPAuthorization()
 {
     m_httpHeaderFields.remove("Authorization");
 }
 
 void ResourceRequest::clearHTTPReferrer()
 {
     m_httpHeaderFields.remove("Referer");
     m_referrerPolicy = ReferrerPolicyDefault;
 }
@@ skipping 218 matching lines @@
 // This is used by the loader to control the number of issued parallel load requests.
 unsigned initializeMaximumHTTPConnectionCountPerHost()
 {
     // The chromium network stack already handles limiting the number of
     // parallel requests per host, so there's no need to do it here.  Therefore,
     // this is set to a high value that should never be hit in practice.
     return 10000;
 }
 
 }