[Net] Propagate priority changes from URLRequest to HttpTransaction

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

 // Copyright (c) 2012 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/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/logging.h"
@@ skipping 137 matching lines @@
     ScopedVector<content::ResourceThrottle>* throttles) {
   if (is_continuation_of_transferred_request)
     ChromeURLRequestUserData::Delete(request);
 
   ChromeURLRequestUserData* user_data =
       ChromeURLRequestUserData::Create(request);
   bool is_prerendering = prerender_tracker_->IsPrerenderingOnIOThread(
       child_id, route_id);
   if (is_prerendering) {
     user_data->set_is_prerender(true);
-    request->set_priority(net::IDLE);
+    request->SetPriority(net::IDLE);
   }
 
 #if defined(OS_ANDROID)
   if (!is_prerendering && resource_type == ResourceType::MAIN_FRAME) {
     throttles->push_back(
         components::InterceptNavigationDelegate::CreateThrottleFor(request));
   }
 #endif
 #if defined(OS_CHROMEOS)
   if (resource_type == ResourceType::MAIN_FRAME) {
@@ skipping 307 matching lines @@
   int child_id, route_id;
   if (!prerender::PrerenderManager::DoesURLHaveValidScheme(redirect_url) &&
       ResourceRequestInfo::ForRequest(request)->GetAssociatedRenderView(
           &child_id, &route_id) &&
       prerender_tracker_->IsPrerenderingOnIOThread(child_id, route_id)) {
     prerender_tracker_->TryCancel(
         child_id, route_id, prerender::FINAL_STATUS_UNSUPPORTED_SCHEME);
     request->Cancel();
   }
 }