Telemetry: Add more details to inspector_backend exceptions.

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.backends.chrome_inspector import devtools_http
@@ skipping 143 matching lines @@
           '\n'.join(browser_finder.GetAllAvailableBrowserTypes(finder_options)))
     finder_options.browser_options.browser_type = (
         possible_browser.browser_type)
 
     return possible_browser
 
   def _RetrieveTabUrl(self, tab, timeout):
     """Retrives the URL of the tab."""
     try:
       return tab.EvaluateJavaScript('document.URL', timeout)
-    except (exceptions.DevtoolsTargetCrashException,
+    except (exceptions.Error,
         devtools_http.DevToolsClientConnectionError,
         devtools_http.DevToolsClientUrlError):
       return None
 
   def _WaitForUrlToChange(self, tab, initial_url, timeout):
     """Waits for the tab to navigate away from its initial url."""
     end_time = time.time() + timeout
     while True:
       seconds_to_wait = end_time - time.time()
       seconds_to_wait = max(0, seconds_to_wait)
@@ skipping 22 matching lines @@
     """
     timeout_in_seconds = 0
 
     queued_tabs = []
     for tab, url in batch:
       initial_url = self._RetrieveTabUrl(tab,
           self._TAB_URL_RETRIEVAL_TIMEOUT_IN_SECONDS)
 
       try:
         tab.Navigate(url, None, timeout_in_seconds)
-      except (exceptions.DevtoolsTargetCrashException,
+      except (exceptions.Error,
           devtools_http.DevToolsClientConnectionError,
           devtools_http.DevToolsClientUrlError):
         # We expect a time out. It's possible for other problems to arise, but
         # this method is not responsible for dealing with them. Ignore all
         # exceptions.
         pass
 
       queued_tabs.append((tab, initial_url))
     return queued_tabs
 
@@ skipping 17 matching lines @@
       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 exceptions.TimeoutException:
         # Ignore time outs.
         pass
-      except (exceptions.DevtoolsTargetCrashException,
+      except (exceptions.Error,
           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):
     """Returns an array of urls to navigate to, given a url_iterator."""
     urls = []
     for _ in xrange(self._NUM_TABS):
@@ skipping 22 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