Enable NQE when Cronet Engine is built

net/nqe/network_quality_estimator.h

Index: net/nqe/network_quality_estimator.h
diff --git a/net/nqe/network_quality_estimator.h b/net/nqe/network_quality_estimator.h
index d11b4841628cec93f6b83ffb75f15e6cd50f8035..7d2746ce1ee3894a4f55fd2480a2e6994af10671 100644
--- a/net/nqe/network_quality_estimator.h
+++ b/net/nqe/network_quality_estimator.h
@@ -256,6 +256,17 @@ class NET_EXPORT_PRIVATE NetworkQualityEstimator
 
   SocketPerformanceWatcherFactory* GetSocketPerformanceWatcherFactory();
 
+  // |use_local_host_requests_for_tests| should only be true when testing
+  // against local HTTP server and allows the requests to local host to be
+  // used for network quality estimation.
+  void SetUseLocalHostRequestsForTesting(
+      bool use_local_host_requests_for_tests);
+
+  // |use_smaller_responses_for_tests| should only be true when testing.
+  // Allows the responses smaller than |kMinTransferSizeInBits| to be used for
+  // network quality estimation.
+  void SetUseSmallResponsesForTesting(bool use_small_responses);
+
  protected:
   // NetworkID is used to uniquely identify a network.
   // For the purpose of network quality estimation and caching, a network is
@@ -490,12 +501,12 @@ class NET_EXPORT_PRIVATE NetworkQualityEstimator
 
   // Determines if the requests to local host can be used in estimating the
   // network quality. Set to true only for tests.
-  const bool use_localhost_requests_;
+  bool use_localhost_requests_;
 
   // Determines if the responses smaller than |kMinTransferSizeInBytes|
   // or shorter than |kMinTransferSizeInBytes| can be used in estimating the
   // network quality. Set to true only for tests.
-  const bool use_small_responses_;
+  bool use_small_responses_;
 
   // The factor by which the weight of an observation reduces every second.
   const double weight_multiplier_per_second_;