Introduce RunLoop::Delegate splitting RunLoop/MessageLoop some more.

components/download/internal/scheduler/network_listener_unittest.cc

 // Copyright 2017 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 "components/download/internal/scheduler/network_listener.h"
 
 #include "base/memory/ptr_util.h"
+#include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ConnectionTypeObserver =
     net::NetworkChangeNotifier::ConnectionTypeObserver;
 using ConnectionType = net::NetworkChangeNotifier::ConnectionType;
 
 namespace download {
 namespace {
@@ skipping 72 matching lines @@
               OnNetworkChange(NetworkListener::NetworkStatus::UNMETERED))
       .Times(1)
       .RetiresOnSaturation();
 
   ChangeNetworkType(ConnectionType::CONNECTION_WIFI);
   ChangeNetworkType(ConnectionType::CONNECTION_ETHERNET);
 }
 
 }  // namespace
 }  // namespace download