Added support for improvement_direction to relevant values, which is propogated to chartjson.

tools/perf/benchmarks/dromaeo.py

 # Copyright 2013 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 math
 import os
 
 from metrics import power
 from telemetry import benchmark
 from telemetry import page as page_module
 from telemetry.page import page_set
 from telemetry.page import page_test
+from telemetry.value import improvement_direction
 from telemetry.value import scalar
 
 
 class _DromaeoMeasurement(page_test.PageTest):
   def __init__(self):
     super(_DromaeoMeasurement, self).__init__(
         action_name_to_run='RunPageInteractions')
     self._power_metric = None
 
   def CustomizeBrowserOptions(self, options):
@@ skipping 48 matching lines @@
         container[key] = {'count': 0, 'sum': 0}
       container[key]['count'] += 1
       container[key]['sum'] += math.log(value)
 
     suffix = page.url[page.url.index('?') + 1 :]
     def AddResult(name, value):
       important = False
       if name == suffix:
         important = True
       results.AddValue(scalar.ScalarValue(
-          results.current_page, Escape(name), 'runs/s', value, important))
+          results.current_page, Escape(name), 'runs/s', value, important,
+          improvement_direction=improvement_direction.UP))
 
     aggregated = {}
     for data in score:
       AddResult('%s/%s' % (data['collection'], data['name']),
                 data['mean'])
 
       top_name = data['collection'].split('-', 1)[0]
       AggregateData(aggregated, top_name, data['mean'])
 
       collection_name = data['collection']
@@ skipping 160 matching lines @@
 
 
 class DromaeoCSSQueryJquery(_DromaeoBenchmark):
   """Dromaeo CSS Query jquery JavaScript benchmark.
 
   Tests traversing a DOM structure using the Prototype JavaScript Library.
   """
   tag = 'cssqueryjquery'
   query_param = 'cssquery-jquery'