[chromedriver] Allow the Offline test

chrome/test/chromedriver/client/chromedriver.py

Index: chrome/test/chromedriver/client/chromedriver.py
diff --git a/chrome/test/chromedriver/client/chromedriver.py b/chrome/test/chromedriver/client/chromedriver.py
index bc65712563014ef1af6713d43e056c0149c1d27e..53dcf4927ff1d7d711ed462f9c96298dcdeb9814 100644
--- a/chrome/test/chromedriver/client/chromedriver.py
+++ b/chrome/test/chromedriver/client/chromedriver.py
@@ -359,12 +359,12 @@ class ChromeDriver(object):
     self.ExecuteCommand(Command.SET_AUTO_REPORTING, {'enabled': enabled})
 
   def SetNetworkConditions(self, latency, download_throughput,
-                           upload_throughput):
+                           upload_throughput, offline=False):
     # Until http://crbug.com/456324 is resolved, we'll always set 'offline' to
     # False, as going "offline" will sever Chromedriver's connection to Chrome.
     params = {
         'network_conditions': {
-            'offline': False,
+            'offline': offline,
             'latency': latency,
             'download_throughput': download_throughput,
             'upload_throughput': upload_throughput