Add a method to override the network conditions of the ChromeDriver session.

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 sys
 import platform
 
 import command_executor
 from command_executor import Command
 from webelement import WebElement
@@ skipping 391 matching lines @@
     conditions = self.ExecuteCommand(Command.GET_NETWORK_CONDITIONS)
     return {
         'latency': conditions['latency'],
         'download_throughput': conditions['download_throughput'],
         'upload_throughput': conditions['upload_throughput'],
         'offline': conditions['offline']
     }
 
   def DeleteNetworkConditions(self):
     self.ExecuteCommand(Command.DELETE_NETWORK_CONDITIONS)
+
+  def SetNetworkConnection(self, connection_type):
+    params = {'parameters': {'type': connection_type}}
+    self.ExecuteCommand(Command.SET_NETWORK_CONNECTION, params)