Remove unnecessary host parameter in forwarder.

build/android/pylib/base/base_test_runner.py

 # Copyright (c) 2012 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.
 
 """Base class for running tests on a single device."""
 
 import contextlib
 import httplib
 import logging
 import os
@@ skipping 130 matching lines @@
                    self._http_server.port)
     else:
       logging.critical('Failed to start http server')
     self.StartForwarderForHttpServer()
     return (self._forwarder_device_port, self._http_server.port)
 
   def _ForwardPort(self, port_pairs):
     """Creates a forwarder instance if needed and forward a port."""
     if not self._forwarder:
       self._forwarder = Forwarder(self.adb, self.build_type)
-    self._forwarder.Run(port_pairs, self.tool, '127.0.0.1')
+    self._forwarder.Run(port_pairs, self.tool)
 
   def StartForwarder(self, port_pairs):
     """Starts TCP traffic forwarding for the given |port_pairs|.
 
     Args:
       host_port_pairs: A list of (device_port, local_port) tuples to forward.
     """
     self._ForwardPort(port_pairs)
 
   def StartForwarderForHttpServer(self):
@@ skipping 61 matching lines @@
         break
       else:
         error_msgs.append(error_msg)
       self._spawning_server.Stop()
       # Wait for 2 seconds then restart.
       time.sleep(2)
     if not server_ready:
       logging.error(';'.join(error_msgs))
       raise Exception('Can not start the test spawner server.')
     self._PushTestServerPortInfoToDevice()