Telemetry: Catch LookupError exception and mark as failure.

tools/telemetry/telemetry/page/page_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.
 import collections
 import glob
 import logging
 import os
 import sys
 import tempfile
 import time
@@ skipping 373 matching lines @@
     else:
       results.AddError(page, sys.exc_info())
 
   try:
     page_state.PreparePage(page, tab, test)
     if state.repeat_state.ShouldNavigate(
         finder_options.skip_navigate_on_repeat):
       page_state.ImplicitPageNavigation(page, tab, test)
     test.Run(finder_options, page, tab, results)
     util.CloseConnections(tab)
-  except page_test.Failure:
+  except (page_test.Failure, LookupError):
     logging.warning('%s:\n%s', page.url, traceback.format_exc())
     if expectation == 'fail':
       logging.info('Failure was expected\n')
       results.AddSuccess(page)
     else:
       results.AddFailure(page, sys.exc_info())
   except (util.TimeoutException, exceptions.LoginException,
           exceptions.ProfilingException):
     ProcessError()
   except (exceptions.TabCrashException, exceptions.BrowserGoneException):
@@ skipping 37 matching lines @@
     logging.error('Device is thermally throttled before running '
                   'performance tests, results will vary.')
 
 
 def _CheckThermalThrottling(platform):
   if not platform.CanMonitorThermalThrottling():
     return
   if platform.HasBeenThermallyThrottled():
     logging.error('Device has been thermally throttled during '
                   'performance tests, results will vary.')