Refactor determineRequestContext() to remove a mutableResourceRequest() call

third_party/WebKit/Source/core/loader/resource/LinkFetchResource.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/loader/resource/LinkFetchResource.h"
 
 #include "platform/loader/fetch/FetchRequest.h"
 #include "platform/loader/fetch/ResourceFetcher.h"
 
 namespace blink {
 
 Resource* LinkFetchResource::fetch(Resource::Type type,
                                    FetchRequest& request,
                                    ResourceFetcher* fetcher) {
   DCHECK_EQ(type, LinkPrefetch);
   DCHECK_EQ(request.resourceRequest().frameType(),
             WebURLRequest::FrameTypeNone);
-  fetcher->determineRequestContext(request.mutableResourceRequest(), type);
+  request.setRequestContext(fetcher->determineRequestContext(type));
   return fetcher->requestResource(request, LinkResourceFactory(type));
 }
 
 LinkFetchResource::LinkFetchResource(const ResourceRequest& request,
                                      Type type,
                                      const ResourceLoaderOptions& options)
     : Resource(request, type, options) {}
 
 LinkFetchResource::~LinkFetchResource() {}
 
 }  // namespace blink