Update GraphingPageCyclerLogProcessor to work with updated Telemetry pagecyclers

scripts/slave/process_log_utils.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.
 
 """Parser and evaluator for performance tests.
 
 Several performance tests have complicated log output, this module is intended
 to help buildsteps parse these logs and identify if tests had anomalies.
 
 
@@ skipping 1013 matching lines @@
       chromium_utils.GetParentClass(self).ProcessLine(self, line)
 
   def _CalculateStatistics(self, value_list, trace_name):
     """Handles statistics generation and recording for page-cycler data.
 
     Sums the timings over all pages for each iteration and returns a tuple
     (mean, standard deviation) of those sums.  Also saves a data file
     <revision>_<tracename>.dat holding a line of times for each URL loaded,
     for use by humans when debugging a regression.
     """
+
+    # If the name of the trace is one of the pages in the page list then we are
+    # dealing with the results for that page only, not the overall results. So
+    # calculate the statistics like a normal GraphingLogProcessor, not the
+    # GraphingPageCyclerLogProcessor.
+    if trace_name in self._page_list:
+      return super(GraphingPageCyclerLogProcessor, self)._CalculateStatistics(
+          value_list, trace_name)
+
     sums = []
     page_times = {}
     page_count = len(self._page_list)
 
     iteration_count = len(value_list) / page_count
     for iteration in range(iteration_count):
       start = page_count * iteration
       end = start + page_count
       iteration_times = value_list[start:end]
       sums += [sum(iteration_times)]
@@ skipping 17 matching lines @@
     for page in self._page_list:
       times = page_times[page]
       mean, stddev = chromium_utils.FilteredMeanAndStandardDeviation(times)
       file_data.append('%s (%s+/-%s): %s' % (page,
                                              FormatFloat(mean),
                                              FormatFloat(stddev),
                                              JoinWithSpacesAndNewLine(times)))
 
     filename = '%s_%s.dat' % (self._revision, trace_name)
     return {filename: file_data}