Update GraphingPageCyclerLogProcessor to work with updated Telemetry pagecyclers

scripts/master/log_parser/process_log.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.
 
 """Defines various log processors used by buildbot steps.
 
 Current approach is to set an instance of log processor in
 the ProcessLogTestStep implementation and it will call process()
 method upon completion with full data from process stdio.
 """
@@ skipping 933 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 21 matching lines @@
            FormatFloat(mean),
            FormatFloat(stddev),
            JoinWithSpacesAndNewLine(times)))
 
     filename = os.path.join(self._output_dir,
                             '%s_%s.dat' % (self._revision, trace_name))
     fileobj = open(filename, 'w')
     fileobj.write(''.join(file_data))
     fileobj.close()
     os.chmod(filename, READABLE_FILE_PERMISSIONS)