Telemetry: Move TimeoutException from util module to exceptions module.

tools/perf/profile_creators/fast_navigation_profile_extender.py

 # Copyright 2015 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 time
 
 from telemetry.core import browser_finder
 from telemetry.core import browser_finder_exceptions
 from telemetry.core import exceptions
 from telemetry.core import platform
-from telemetry.core import util
 from telemetry.core.backends.chrome_inspector import devtools_http
 
 
 class FastNavigationProfileExtender(object):
   """Extends a Chrome profile.
 
   This class creates or extends an existing profile by performing a set of tab
   navigations in large batches. This is accomplished by opening a large number
   of tabs, simultaneously navigating all the tabs, and then waiting for all the
   tabs to load. This provides two benefits:
@@ skipping 212 matching lines @@
 
       # Since we don't wait any time for the tab url navigation to commit, it's
       # possible that the tab hasn't started navigating yet.
       self._WaitForUrlToChange(tab, initial_url, seconds_to_wait)
 
       seconds_to_wait = end_time - time.time()
       seconds_to_wait = max(0, seconds_to_wait)
 
       try:
         tab.WaitForDocumentReadyStateToBeComplete(seconds_to_wait)
-      except util.TimeoutException:
+      except exceptions.TimeoutException:
         # Ignore time outs.
         pass
       except (exceptions.DevtoolsTargetCrashException,
           devtools_http.DevToolsClientConnectionError,
           devtools_http.DevToolsClientUrlError):
         # If any error occurs, remove the tab. it's probably in an
         # unrecoverable state.
         self._RemoveNavigationTab(tab)
 
   def _GetUrlsToNavigate(self, url_iterator):
@@ skipping 25 matching lines @@
         tab = self._navigation_tabs[i]
         batch.append((tab, url))
 
       queued_tabs = self._BatchNavigateTabs(batch)
       self._WaitForQueuedTabsToLoad(queued_tabs)
 
       self.CleanUpAfterBatchNavigation()
 
       if self.ShouldExitAfterBatchNavigation():
         break