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

tools/perf/benchmarks/sunspider.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 collections
 import json
 import os
 
 from metrics import power
 from telemetry import benchmark
 from telemetry import page as page_module
@@ skipping 99 matching lines @@
     totals = []
     for result in js_results:
       total = 0
       for key, value in result.iteritems():
         r[key].append(value)
         total += value
       totals.append(total)
     for key, values in r.iteritems():
       results.AddValue(list_of_scalar_values.ListOfScalarValues(
           results.current_page, key, 'ms', values, important=False,
-          description=DESCRIPTIONS.get(key)))
+          description=DESCRIPTIONS.get(key), higher_is_better=False))
     results.AddValue(list_of_scalar_values.ListOfScalarValues(
         results.current_page, 'Total', 'ms', totals,
         description='Totals of run time for each different type of benchmark '
-                    'in sunspider'))
+                    'in sunspider',
+        higher_is_better=False))
 
 
 class Sunspider(benchmark.Benchmark):
   """Apple's SunSpider JavaScript benchmark."""
   test = _SunspiderMeasurement
 
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
         archive_data_file='../page_sets/data/sunspider.json',
         file_path=os.path.abspath(__file__),
         bucket=page_set.PARTNER_BUCKET)
     ps.AddUserStory(page_module.Page(
         _URL, ps, ps.base_dir, make_javascript_deterministic=False))
     return ps