Add functionality for embedders to configure NQE

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 121 matching lines @@
   const HttpCacheType http_cache;
   // Max size of http cache in bytes.
   const int http_cache_max_size;
   // Disable caching for HTTP responses. Other information may be stored in
   // the cache.
   const bool load_disable_cache;
   // Storage path for http cache and cookie storage.
   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;
 
   // Enable network quality estimator.
   const bool enable_network_quality_estimator;
 
   // Enable public key pinning bypass for local trust anchors.
   const bool bypass_public_key_pinning_for_local_trust_anchors;
 
   // Data to populte CertVerifierCache.
   const std::string cert_verifier_data;
 
   // App-provided list of servers that support QUIC.
   ScopedVector<QuicHint> quic_hints;
 
   // The list of public key pins.
   ScopedVector<Pkp> pkp_list;
 
   // Experimental options that are recognized by the config parser.
   std::unique_ptr<base::DictionaryValue> effective_experimental_options;
 
  private:
+  // 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;

[xunjieli, 2017/05/02 17:56:34]

nice!

+
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextConfig);
 };
 
 // Stores intermediate state for URLRequestContextConfig.  Initializes with
 // (mostly) sane defaults, then the appropriate member variables can be
 // modified, and it can be finalized with Build().
 struct URLRequestContextConfigBuilder {
   URLRequestContextConfigBuilder();
   ~URLRequestContextConfigBuilder();
 
@@ skipping 44 matching lines @@
   // Data to populate CertVerifierCache.
   std::string cert_verifier_data = "";
 
  private:
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextConfigBuilder);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_