Add Network Quality Estimator (NQE) pref manager

net/nqe/network_quality_estimator_unittest.cc

Index: net/nqe/network_quality_estimator_unittest.cc
diff --git a/net/nqe/network_quality_estimator_unittest.cc b/net/nqe/network_quality_estimator_unittest.cc
index 092f3fa97e179a6dfbe8de45d50f661edf71486a..a7b5a1ca8b4a1b1e2491a2bee1ff0453a6214e82 100644
--- a/net/nqe/network_quality_estimator_unittest.cc
+++ b/net/nqe/network_quality_estimator_unittest.cc
@@ -2003,8 +2003,7 @@ TEST(NetworkQualityEstimatorTest, CacheObserver) {
   TestNetworkQualityEstimator estimator(variation_params);
 
   // Add |observer| as a persistent caching observer.
-  estimator.NetworkQualityStoreForTesting()->AddNetworkQualitiesCacheObserver(
-      &observer);
+  estimator.AddNetworkQualitiesCacheObserver(&observer);
 
   estimator.set_recent_effective_connection_type(EFFECTIVE_CONNECTION_TYPE_3G);
   estimator.SimulateNetworkChange(
@@ -2037,8 +2036,7 @@ TEST(NetworkQualityEstimatorTest, CacheObserver) {
   EXPECT_EQ(1u, observer.get_notification_received_and_reset());
 
   // Remove |observer|, and it should not receive any notifications.
-  estimator.NetworkQualityStoreForTesting()
-      ->RemoveNetworkQualitiesCacheObserver(&observer);
+  estimator.RemoveNetworkQualitiesCacheObserver(&observer);
   estimator.set_recent_effective_connection_type(EFFECTIVE_CONNECTION_TYPE_3G);
   estimator.SimulateNetworkChange(
       NetworkChangeNotifier::ConnectionType::CONNECTION_2G, "test2g");