Add functionality for embedders to configure NQE

components/cronet/url_request_context_config.h

Index: components/cronet/url_request_context_config.h
diff --git a/components/cronet/url_request_context_config.h b/components/cronet/url_request_context_config.h
index 7b13833b528f1485c3c576facd558a14d82b3c31..0a4cae32b192f4f45cf5b65ec0fd85577c9575cf 100644
--- a/components/cronet/url_request_context_config.h
+++ b/components/cronet/url_request_context_config.h
@@ -23,6 +23,7 @@ class SequencedTaskRunner;
 namespace net {
 class CertVerifier;
 class NetLog;
+class NetworkQualityEstimatorParams;
 class URLRequestContextBuilder;
 }  // namespace net
 
@@ -141,13 +142,6 @@ struct URLRequestContextConfig {
   const std::string storage_path;
   // User-Agent request header field.
   const std::string user_agent;
-  // Experimental options encoded as a string in a JSON format containing
-  // experiments and their corresponding configuration options. The format
-  // is a JSON object with the name of the experiment as the key, and the
-  // configuration options as the value. An example:
-  //   {"experiment1": {"option1": "option_value1", "option2": "option_value2",
-  //    ...}, "experiment2: {"option3", "option_value3", ...}, ...}
-  const std::string experimental_options;
 
   // Certificate verifier for testing.
   std::unique_ptr<net::CertVerifier> mock_cert_verifier;
@@ -171,6 +165,9 @@ struct URLRequestContextConfig {
   std::unique_ptr<base::DictionaryValue> effective_experimental_options =
       nullptr;
 
+  // Configuration parameters for the network quality estimator.
+  std::unique_ptr<net::NetworkQualityEstimatorParams> nqe_params;
+
  private:
   // Parses experimental options and makes appropriate changes to settings in
   // the URLRequestContextConfig and URLRequestContextBuilder.
@@ -179,6 +176,14 @@ struct URLRequestContextConfig {
       net::NetLog* net_log,
       const scoped_refptr<base::SequencedTaskRunner>& file_task_runner);
 
+  // Experimental options encoded as a string in a JSON format containing
+  // experiments and their corresponding configuration options. The format
+  // is a JSON object with the name of the experiment as the key, and the
+  // configuration options as the value. An example:
+  //   {"experiment1": {"option1": "option_value1", "option2": "option_value2",
+  //    ...}, "experiment2: {"option3", "option_value3", ...}, ...}
+  const std::string experimental_options;
+
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextConfig);
 };