Make timeout_retry include the total timeout in the exception error

devil/devil/utils/watchdog_timer.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.
 
 """WatchdogTimer timeout objects."""
 
 import time
 
 
 class WatchdogTimer(object):
@@ skipping 19 matching lines @@
     """Returns the elapsed time of the watchdog."""
     return time.time() - self._start_time
 
   def GetRemaining(self):
     """Returns the remaining time of the watchdog."""
     if self._timeout:
       return self._timeout - self.GetElapsed()
     else:
       return None
 
+  def GetTimeout(self):
+    """Returns the timout of the watchdog."""
+    return self._timeout
+
   def IsTimedOut(self):
     """Whether the watchdog has timed out.
 
     Returns:
       True if the watchdog has timed out, False otherwise.
     """
     remaining = self.GetRemaining()
     return remaining is not None and remaining < 0