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

tools/perf/benchmarks/octane.py

 # Copyright 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.
 
 """Runs Octane 2.0 javascript benchmark.
 
 Octane 2.0 is a modern benchmark that measures a JavaScript engine's performance
 by running a suite of tests representative of today's complex and demanding web
 applications. Octane's goal is to measure the performance of JavaScript code
 found in large, real-world web applications.
@@ skipping 99 matching lines @@
       # Split the results into score and test name.
       # results log e.g., "Richards: 18343"
       score_and_name = output.split(': ', 2)
       assert len(score_and_name) == 2, \
         'Unexpected result format "%s"' % score_and_name
       if 'Skipped' not in score_and_name[1]:
         name = score_and_name[0]
         score = int(score_and_name[1])
         results.AddValue(scalar.ScalarValue(
             results.current_page, name, 'score', score, important=False,
-            description=DESCRIPTIONS.get(name)))
+            description=DESCRIPTIONS.get(name), higher_is_better=True))
 
         # Collect all test scores to compute geometric mean.
         all_scores.append(score)
     total = statistics.GeometricMean(all_scores)
     results.AddSummaryValue(
         scalar.ScalarValue(None, 'Total.Score', 'score', total,
                            description='Geometric mean of the scores of each '
                                        'individual benchmark in the Octane '
                                        'benchmark collection.'))
 
 
 class Octane(benchmark.Benchmark):
   """Google's Octane JavaScript benchmark."""
   test = _OctaneMeasurement
 
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
       archive_data_file='../page_sets/data/octane.json',
       file_path=os.path.abspath(__file__),
       bucket=page_set.PUBLIC_BUCKET)
     ps.AddUserStory(page_module.Page(
         'http://octane-benchmark.googlecode.com/svn/latest/index.html?auto=1',
         ps, ps.base_dir, make_javascript_deterministic=False))
     return ps