[chromedriver] Add Network Presets to Network Throttling feature

chrome/test/chromedriver/chrome/network_conditions.h

 // Copyright (c) 2015 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 CHROME_TEST_CHROMEDRIVER_CHROME_NETWORK_CONDITIONS_H_
 #define CHROME_TEST_CHROMEDRIVER_CHROME_NETWORK_CONDITIONS_H_
 
+#include <string>
+#include "base/memory/scoped_ptr.h"
+
+class Status;
+
 struct NetworkConditions {
+  NetworkConditions();
+  NetworkConditions(bool offline, double latency,
+                    double download_throughput, double upload_throughput);
+  ~NetworkConditions();
   bool offline;
   double latency;
   double download_throughput;
   double upload_throughput;
 };
 
+Status FindPresetNetwork(
+    std::string network_name,
+    NetworkConditions* network_conditions);
+
 #endif  // CHROME_TEST_CHROMEDRIVER_CHROME_NETWORK_CONDITIONS_H_