Remove FetchRequest::mutableResourceRequest() where removing is trivial

third_party/WebKit/Source/core/loader/LinkLoader.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 332 matching lines @@
 }
 
 static Resource* prefetchIfNeeded(Document& document,
                                   const KURL& href,
                                   const LinkRelAttribute& relAttribute,
                                   CrossOriginAttributeValue crossOrigin,
                                   ReferrerPolicy referrerPolicy) {
   if (relAttribute.isLinkPrefetch() && href.isValid() && document.frame()) {
     UseCounter::count(document, UseCounter::LinkRelPrefetch);
 
-    FetchRequest linkRequest(ResourceRequest(document.completeURL(href)),
-                             FetchInitiatorTypeNames::link);
+    ResourceRequest resourceRequest(document.completeURL(href));
     if (referrerPolicy != ReferrerPolicyDefault) {
-      linkRequest.mutableResourceRequest().setHTTPReferrer(
-          SecurityPolicy::generateReferrer(referrerPolicy, href,
-                                           document.outgoingReferrer()));
+      resourceRequest.setHTTPReferrer(SecurityPolicy::generateReferrer(
+          referrerPolicy, href, document.outgoingReferrer()));
     }
+
+    FetchRequest linkRequest(resourceRequest, FetchInitiatorTypeNames::link);
     if (crossOrigin != CrossOriginAttributeNotSet) {
       linkRequest.setCrossOriginAccessControl(document.getSecurityOrigin(),
                                               crossOrigin);
     }
     return LinkFetchResource::fetch(Resource::LinkPrefetch, linkRequest,
                                     document.fetcher());
   }
   return nullptr;
 }
 
@@ skipping 117 matching lines @@
 
 DEFINE_TRACE(LinkLoader) {
   visitor->trace(m_client);
   visitor->trace(m_prerender);
   visitor->trace(m_linkPreloadResourceClient);
   ResourceOwner<Resource, ResourceClient>::trace(visitor);
   PrerenderClient::trace(visitor);
 }
 
 }  // namespace blink