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

net/proxy/dhcp_proxy_script_adapter_fetcher_win_unittest.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_adapter_fetcher_win.h"
 
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 126 matching lines @@
   MockProxyScriptFetcher* fetcher_;
   base::OneShotTimer fetcher_timer_;
   scoped_refptr<DelayingDhcpQuery> dhcp_query_;
 };
 
 class FetcherClient {
  public:
   FetcherClient()
       : url_request_context_(new TestURLRequestContext()),
         worker_pool_(
-            new base::SequencedWorkerPool(4, "DhcpAdapterFetcherTest")),
+            new base::SequencedWorkerPool(4,
+                                          "DhcpAdapterFetcherTest",
+                                          base::TaskPriority::USER_VISIBLE)),
         fetcher_(new MockDhcpProxyScriptAdapterFetcher(
             url_request_context_.get(),
             worker_pool_->GetTaskRunnerWithShutdownBehavior(
-                base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN))) {
-  }
+                base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN))) {}
 
   ~FetcherClient() {
     worker_pool_->Shutdown();
   }
 
   void WaitForResult(int expected_error) {
     EXPECT_EQ(expected_error, callback_.WaitForResult());
   }
 
   void RunTest() {
@@ skipping 172 matching lines @@
   EXPECT_EQ(BASE_URL,
             DhcpProxyScriptAdapterFetcher::SanitizeDhcpApiString(
                 BASE_URL "\0foo\0blat", kBaseUrlLen + 9));
 }
 
 #undef BASE_URL
 
 }  // namespace
 
 }  // namespace net