Enable NQE when Cronet Engine is built

components/cronet/url_request_context_config.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_
 #define COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 89 matching lines @@
       const std::string& experimental_options,
       // Data reduction proxy key.
       const std::string& data_reduction_proxy_key,
       // Data reduction proxy.
       const std::string& data_reduction_primary_proxy,
       // Fallback data reduction proxy.
       const std::string& data_reduction_fallback_proxy,
       // Data reduction proxy secure proxy check URL.
       const std::string& data_reduction_secure_proxy_check_url,
       // MockCertVerifier to use for testing purposes.
-      std::unique_ptr<net::CertVerifier> mock_cert_verifier);
+      std::unique_ptr<net::CertVerifier> mock_cert_verifier,
+      // Enable network quality estimator.
+      bool enable_network_quality_estimator);
   ~URLRequestContextConfig();
 
   // Configure |context_builder| based on |this|.
   void ConfigureURLRequestContextBuilder(
       net::URLRequestContextBuilder* context_builder,
       net::NetLog* net_log,
       const scoped_refptr<base::SequencedTaskRunner>& file_task_runner);
 
   // Enable QUIC.
   const bool enable_quic;
@@ skipping 23 matching lines @@
   const std::string experimental_options;
   // Enable Data Reduction Proxy with authentication key.
   const std::string data_reduction_proxy_key;
   const std::string data_reduction_primary_proxy;
   const std::string data_reduction_fallback_proxy;
   const std::string data_reduction_secure_proxy_check_url;
 
   // Certificate verifier for testing.
   std::unique_ptr<net::CertVerifier> mock_cert_verifier;
 
+  // Enable network quality estimator.
+  const bool enable_network_quality_estimator;
+
   // App-provided list of servers that support QUIC.
   ScopedVector<QuicHint> quic_hints;
 
   // The list of public key pins.
   ScopedVector<Pkp> pkp_list;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextConfig);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_