Remove 'WebURLRequest::TargetType' from PrefetchHelper.

chrome/renderer/prefetch_helper.cc

 // Copyright (c) 2014 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 "chrome/renderer/prefetch_helper.h"
 
 #include "chrome/common/prefetch_messages.h"
 #include "content/public/renderer/render_frame.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebURLLoaderOptions.h"
@@ skipping 15 matching lines @@
     IPC_MESSAGE_HANDLER(PrefetchMsg_Prefetch, OnPrefetch)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void PrefetchHelper::OnPrefetch(const GURL& url) {
   blink::WebFrame* frame = render_frame()->GetWebFrame();
   blink::WebURLRequest request(url);
-  request.setTargetType(blink::WebURLRequest::TargetIsPrefetch);
+  request.setRequestContext(blink::WebURLRequest::RequestContextPrefetch);
   request.setPriority(blink::WebURLRequest::PriorityVeryLow);
   blink::WebURLLoaderOptions options;
   options.allowCredentials = true;
   options.crossOriginRequestPolicy =
       blink::WebURLLoaderOptions::CrossOriginRequestPolicyAllow;
   blink::WebURLLoader* loader = frame->createAssociatedURLLoader(options);
   loader->loadAsynchronously(request, this);
   loader_set_.insert(loader);
 }
 
 void PrefetchHelper::didFinishLoading(blink::WebURLLoader* loader,
                                       double finishTime,
                                       int64_t totalEncodedDataLength) {
   loader_set_.erase(loader);
 }
 
 void PrefetchHelper::didFail(blink::WebURLLoader* loader,
                              const blink::WebURLError& error) {
   loader_set_.erase(loader);
 }
 
 }  // namespace prefetch