Register metric Histogram names.

telemetry/telemetry/internal/story_runner.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 logging
 import optparse
 import os
 import subprocess
 import sys
 import time
 
 import py_utils
 from py_utils import cloud_storage  # pylint: disable=import-error
 
 from telemetry.core import exceptions
 from telemetry import decorators
 from telemetry.internal.actions import page_action
 from telemetry.internal.browser import browser_finder
 from telemetry.internal.results import results_options
 from telemetry.internal.util import exception_formatter
 from telemetry import page
 from telemetry.page import legacy_page_test
 from telemetry import story as story_module
 from telemetry.util import wpr_modes
 from telemetry.value import failure
 from telemetry.value import skip
 from telemetry.web_perf import story_test
 
+from tracing.metrics import all_histogram_names
+
 
 class ArchiveError(Exception):
   pass
 
 
 def AddCommandLineArgs(parser):
   story_module.StoryFilter.AddCommandLineArgs(parser)
   results_options.AddResultsOptions(parser)
 
   # Page set options
@@ skipping 23 matching lines @@
   story_module.StoryFilter.ProcessCommandLineArgs(parser, args)
   results_options.ProcessCommandLineArgs(parser, args)
 
   if args.pageset_repeat < 1:
     parser.error('--pageset-repeat must be a positive integer.')
 
 
 def _RunStoryAndProcessErrorIfNeeded(story, results, state, test):
   def ProcessError(description=None):
     state.DumpStateUponFailure(story, results)
-    results.AddValue(failure.FailureValue(story, sys.exc_info(), description))
+    if test.GetTimelineBasedMetrics():
+      for unused_name in all_histogram_names.AllHistogramNames(
+          test.GetTimelineBasedMetrics()):
+        pass  # TODO(benjhayden): Synthesize Failure Histograms here.
+    else:
+      results.AddValue(failure.FailureValue(story, sys.exc_info(), description))
+
   try:
     # TODO(mikecase): Remove this logging once Android perf bots are swarmed.
     # crbug.com/678282
     if state.platform.GetOSName() == 'android':
       state.platform._platform_backend.Log(
           'START %s' % (story.name if story.name else str(story)))
     if isinstance(test, story_test.StoryTest):
       test.WillRunStory(state.platform)
     state.WillRunStory(story)
     if not state.CanRunStory(story):
@@ skipping 375 matching lines @@
     logging.warning('Device is thermally throttled before running '
                     'performance tests, results will vary.')
 
 
 def _CheckThermalThrottling(platform):
   if not platform.CanMonitorThermalThrottling():
     return
   if platform.HasBeenThermallyThrottled():
     logging.warning('Device has been thermally throttled during '
                     'performance tests, results will vary.')