Use net::TestNetworkQualityEstimator for data reduction proxy tests

net/nqe/network_quality_estimator_test_util.h

 // Copyright 2016 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/nqe/network_quality_estimator.h"
+#ifndef NET_NQE_NETWORK_QUALITY_ESTIMATOR_TEST_UTIL_H_
+#define NET_NQE_NETWORK_QUALITY_ESTIMATOR_TEST_UTIL_H_
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "net/base/network_change_notifier.h"
 #include "net/nqe/effective_connection_type.h"
+#include "net/nqe/network_quality_estimator.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
 
 namespace net {
 
 class ExternalEstimateProvider;
 
 namespace test_server {
 struct HttpRequest;
@@ skipping 162 matching lines @@
   int32_t recent_downlink_throughput_kbps_;
 
   double rand_double_;
 
   EmbeddedTestServer embedded_test_server_;
 
   DISALLOW_COPY_AND_ASSIGN(TestNetworkQualityEstimator);
 };
 
 }  // namespace net
+
+#endif  // NET_NQE_NETWORK_QUALITY_ESTIMATOR_TEST_UTIL_H_