Instantiate ScopedTaskEnvironment in net unittests.

net/dns/address_sorter_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/dns/address_sorter.h"
 
 #if defined(OS_WIN)
 #include <winsock2.h>
 #endif
 
 #include "base/bind.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/test/scoped_task_scheduler.h"
 #include "net/base/address_list.h"
 #include "net/base/ip_address.h"
 #include "net/base/test_completion_callback.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_WIN)
 #include "net/base/winsock_init.h"
 #endif
 
 namespace net {
 namespace {
 
 IPEndPoint MakeEndPoint(const std::string& str) {
   IPAddress addr;
   CHECK(addr.AssignFromIPLiteral(str));
   return IPEndPoint(addr, 0);
 }
 
 void OnSortComplete(AddressList* result_buf,
                     const CompletionCallback& callback,
                     bool success,
                     const AddressList& result) {
   if (success)
     *result_buf = result;
   callback.Run(success ? OK : ERR_FAILED);
 }
 
 TEST(AddressSorterTest, Sort) {
-  base::test::ScopedTaskScheduler scoped_task_scheduler(
-      base::MessageLoop::current());
   int expected_result = OK;
 #if defined(OS_WIN)
   EnsureWinsockInit();
   SOCKET sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
   if (sock == INVALID_SOCKET) {
     expected_result = ERR_FAILED;
   } else {
     closesocket(sock);
   }
 #endif
   std::unique_ptr<AddressSorter> sorter(AddressSorter::CreateAddressSorter());
   AddressList list;
   list.push_back(MakeEndPoint("10.0.0.1"));
   list.push_back(MakeEndPoint("8.8.8.8"));
   list.push_back(MakeEndPoint("::1"));
   list.push_back(MakeEndPoint("2001:4860:4860::8888"));
 
   AddressList result;
   TestCompletionCallback callback;
   sorter->Sort(list, base::Bind(&OnSortComplete, &result,
                                 callback.callback()));
   EXPECT_EQ(expected_result, callback.WaitForResult());
 }
 
 }  // namespace
 }  // namespace net