mojo_benchmark: aggregate results over multiple runs.

mojo/devtools/common/devtoolslib/perf_dashboard.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.
 
 # Disable the line-too-long warning.
 # pylint: disable=C0301
 """This module implements the Chromium Performance Dashboard JSON v1.0 data
 format.
 
 See http://www.chromium.org/developers/speed-infra/performance-dashboard/sending-data-to-the-performance-dashboard.
@@ skipping 22 matching lines @@
 
   def record_scalar(self, chart_name, value_name, units, value):
     """Records a single measurement value of a scalar type."""
     if chart_name not in self.charts:
       self.charts[chart_name] = {}
     self.charts[chart_name][value_name] = {
         'type': 'scalar',
         'units': units,
         'value': value}
 
+  def record_vector(self, chart_name, value_name, units, values):
+    """Records a single measurement value of a list of scalars type."""
+    if chart_name not in self.charts:
+      self.charts[chart_name] = {}
+    self.charts[chart_name][value_name] = {
+        'type': 'list_of_scalar_values',
+        'units': units,
+        'values': values}
+
   def get_chart_data(self):
     """Returns the JSON string representing the recorded chart data, wrapping
     it with the required meta data."""
     chart_data = {
         'format_version': '1.0',
         'benchmark_name': self.benchmark_name,
         'charts': self.charts
     }
     return chart_data
 
@@ skipping 146 matching lines @@
 
     dashboard_params = urllib.urlencode({
         'masters': master_name,
         'bots': bot_name,
         'tests': test_name,
         'rev': point_id
     })
     print 'Results Dashboard: %s/report?%s' % (upload_url, dashboard_params)
 
   return True