Implementing direction_of_improvement

tools/run-bisect-perf-regression.py

Index: tools/run-bisect-perf-regression.py
diff --git a/tools/run-bisect-perf-regression.py b/tools/run-bisect-perf-regression.py
index aa3251dcec58a0947703afd4c0484fd6a3fa0f12..344e36b1691b1aa0e2da68852bcd022c5783a0ea 100755
--- a/tools/run-bisect-perf-regression.py
+++ b/tools/run-bisect-perf-regression.py
@@ -207,6 +207,9 @@ def _CreateBisectOptionsFromConfig(config):
   if config.has_key('goma_dir'):
     opts_dict['goma_dir'] = config['goma_dir']
 
+  if config.has_key('improvement_direction'):
+    opts_dict['improvement_direction'] = int(config['improvement_direction'])
+
   opts_dict['build_preference'] = 'ninja'
   opts_dict['output_buildbot_annotations'] = True
 
@@ -403,6 +406,9 @@ def _RunBisectionScript(
   if config.has_key('bisect_mode'):
     cmd.extend(['--bisect_mode', config['bisect_mode']])
 
+  if config.has_key('improvement_direction'):
+    cmd.extend(['-d', config['improvement_direction']])
+
   cmd.extend(['--build_preference', 'ninja'])
 
   if '--browser=cros' in config['command']: