Add TaskPriority as a parameter to SequencedWorkerPool in preparation for TaskScheduler experiment.

net/proxy/dhcp_proxy_script_fetcher_win.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 "net/proxy/dhcp_proxy_script_fetcher_win.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 40 matching lines @@
 namespace net {
 
 DhcpProxyScriptFetcherWin::DhcpProxyScriptFetcherWin(
     URLRequestContext* url_request_context)
     : state_(STATE_START),
       num_pending_fetchers_(0),
       destination_string_(NULL),
       url_request_context_(url_request_context) {
   DCHECK(url_request_context_);
 
-  worker_pool_ = new base::SequencedWorkerPool(kMaxDhcpLookupThreads,
-                                               "PacDhcpLookup");
+  worker_pool_ = new base::SequencedWorkerPool(
+      kMaxDhcpLookupThreads, "PacDhcpLookup", base::TaskPriority::USER_VISIBLE);
 }
 
 DhcpProxyScriptFetcherWin::~DhcpProxyScriptFetcherWin() {
   // Count as user-initiated if we are not yet in STATE_DONE.
   Cancel();
 
   worker_pool_->Shutdown();
 }
 
 int DhcpProxyScriptFetcherWin::Fetch(base::string16* utf16_text,
@@ skipping 301 matching lines @@
 
 bool DhcpProxyScriptFetcherWin::AdapterQuery::ImplGetCandidateAdapterNames(
     std::set<std::string>* adapter_names) {
   return DhcpProxyScriptFetcherWin::GetCandidateAdapterNames(adapter_names);
 }
 
 DhcpProxyScriptFetcherWin::AdapterQuery::~AdapterQuery() {
 }
 
 }  // namespace net