[chromedriver] Add Network Presets to Network Throttling feature

chrome/test/chromedriver/client/chromedriver.py

 # Copyright 2013 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.
 
 import command_executor
 from command_executor import Command
 from webelement import WebElement
 
 
 class ChromeDriverException(Exception):
@@ skipping 354 matching lines @@
     params = {
         'network_conditions': {
             'offline': False,
             'latency': latency,
             'download_throughput': download_throughput,
             'upload_throughput': upload_throughput
         }
     }
     self.ExecuteCommand(Command.SET_NETWORK_CONDITIONS, params)
 
+  def SetNetworkConditionsName(self, network_name):
+    self.ExecuteCommand(
+        Command.SET_NETWORK_CONDITIONS, {'network_name': network_name})
+
   def GetNetworkConditions(self):
     conditions = self.ExecuteCommand(Command.GET_NETWORK_CONDITIONS)
     return {
         'latency': conditions['latency'],
         'download_throughput': conditions['download_throughput'],
         'upload_throughput': conditions['upload_throughput'],
         'offline': conditions['offline']
     }