Use net::TestNetworkQualityEstimator for data reduction proxy tests

components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
index 3fe3fce5cdb21aa1350acf4c099628ad8d80818f..86063221003ab963f83345952d02640f98b9e5b4 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate_unittest.cc
@@ -44,6 +44,7 @@
 #include "net/http/http_util.h"
 #include "net/nqe/effective_connection_type.h"
 #include "net/nqe/network_quality_estimator.h"
+#include "net/nqe/network_quality_estimator_test_util.h"
 #include "net/proxy/proxy_config.h"
 #include "net/proxy/proxy_info.h"
 #include "net/proxy/proxy_retry_info.h"
@@ -141,28 +142,6 @@ class TestLoFiUIService : public LoFiUIService {
   bool on_lofi_response_;
 };
 
-// Overrides net::NetworkQualityEstimator for testing.
-class TestNetworkQualityEstimator : public net::NetworkQualityEstimator {
- public:
-  TestNetworkQualityEstimator(
-      const std::map<std::string, std::string>& variation_params,
-      net::EffectiveConnectionType effective_connection_type)
-      : NetworkQualityEstimator(
-            std::unique_ptr<net::ExternalEstimateProvider>(),
-            variation_params),
-        effective_connection_type_(effective_connection_type) {}
-
-  ~TestNetworkQualityEstimator() override {}
-
-  net::EffectiveConnectionType GetEffectiveConnectionType() const override {
-    return effective_connection_type_;
-  }
-
- private:
-  // Estimate of the quality of the network.
-  net::EffectiveConnectionType effective_connection_type_;
-};
-
 class DataReductionProxyNetworkDelegateTest : public testing::Test {
  public:
   DataReductionProxyNetworkDelegateTest()
@@ -533,8 +512,9 @@ TEST_F(DataReductionProxyNetworkDelegateTest, RequestDataConfigurations) {
     net::ProxyRetryInfoMap proxy_retry_info;
 
     std::map<std::string, std::string> network_quality_estimator_params;
-    TestNetworkQualityEstimator test_network_quality_estimator(
-        network_quality_estimator_params,
+    net::TestNetworkQualityEstimator test_network_quality_estimator(
+        network_quality_estimator_params);
+    test_network_quality_estimator.set_effective_connection_type(
         net::EFFECTIVE_CONNECTION_TYPE_OFFLINE);
     context()->set_network_quality_estimator(&test_network_quality_estimator);
 
@@ -621,8 +601,10 @@ TEST_F(DataReductionProxyNetworkDelegateTest, RedirectRequestDataCleared) {
   net::ProxyRetryInfoMap proxy_retry_info;
 
   std::map<std::string, std::string> network_quality_estimator_params;
-  TestNetworkQualityEstimator test_network_quality_estimator(
-      network_quality_estimator_params, net::EFFECTIVE_CONNECTION_TYPE_OFFLINE);
+  net::TestNetworkQualityEstimator test_network_quality_estimator(
+      network_quality_estimator_params);
+  test_network_quality_estimator.set_effective_connection_type(
+      net::EFFECTIVE_CONNECTION_TYPE_OFFLINE);
   context()->set_network_quality_estimator(&test_network_quality_estimator);
 
   std::unique_ptr<net::URLRequest> request = context()->CreateRequest(