Telemetry: Add more details to inspector_backend exceptions.

tools/chrome_proxy/integration_tests/chrome_proxy_measurements.py

 # Copyright 2014 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 base64
 import logging
 import urlparse
 
 from integration_tests import chrome_proxy_metrics as metrics
 from metrics import loading
@@ skipping 75 matching lines @@
       return True
     return False
 
   def RunNavigateSteps(self, page, tab):
     # The redirect from safebrowsing causes a timeout. Ignore that.
     try:
       super(ChromeProxyValidation, self).RunNavigateSteps(page, tab)
       if self._expect_timeout:
         raise metrics.ChromeProxyMetricException, (
             'Timeout was expected, but did not occur')
-    except exceptions.DevtoolsTargetCrashException, e:
+    except exceptions.TimeoutException as e:
       if self._expect_timeout:
         logging.warning('Navigation timeout on page %s',
                         page.name if page.name else page.url)
       else:
         raise e
 
 
 class ChromeProxyHeaders(ChromeProxyValidation):
   """Correctness measurement for response headers."""
 
@@ skipping 271 matching lines @@
             self._metrics.AddResultsForDataSaving,
             ],
         'bypass': [self._metrics.AddResultsForBypass],
         }
     if not self._page.name in page_to_metrics:
       raise page_test.MeasurementFailure(
           'Invalid page name (%s) in smoke. Page name must be one of:\n%s' % (
           self._page.name, page_to_metrics.keys()))
     for add_result in page_to_metrics[self._page.name]:
       add_result(tab, results)