Add Data Saver support to Cronet

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 <string>
 
 #include "base/json/json_value_converter.h"
@@ skipping 56 matching lines @@
   // the cache.
   bool load_disable_cache;
   // Storage path for http cache and cookie storage.
   std::string storage_path;
   // User-Agent request header field.
   std::string user_agent;
   // App-provided list of servers that support QUIC.
   ScopedVector<QuicHint> quic_hints;
   // Comma-separted list of QUIC connection options.
   std::string quic_connection_options;
+  // Enable Data Saver with authentication key.
+  bool enable_data_saver;
+  std::string data_saver_key;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextConfig);
 };
 
 }  // namespace cronet
 
 #endif  // COMPONENTS_CRONET_URL_REQUEST_CONTEXT_CONFIG_H_