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

tools/perf/measurements/rasterize_and_record_micro.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 sys
 import time
 
 from telemetry.core.util import TimeoutException
 from telemetry.page import page_test
+from telemetry.value import improvement_direction
 from telemetry.value import scalar
 
 
 class RasterizeAndRecordMicro(page_test.PageTest):
   def __init__(self, start_wait_time=2, rasterize_repeat=100, record_repeat=100,
                timeout=120, report_detailed_results=False):
     super(RasterizeAndRecordMicro, self).__init__('')
     self._chrome_branch_number = None
     self._start_wait_time = start_wait_time
     self._rasterize_repeat = rasterize_repeat
@@ skipping 46 matching lines @@
     pixels_rasterized = data['pixels_rasterized']
     rasterize_time = data['rasterize_time_ms']
     # TODO(schenney): Remove this workaround when reference builds get past
     # the change that adds this comment.
     if ('picture_memory_usage' in data):
       picture_memory_usage = data['picture_memory_usage']
     else:
       picture_memory_usage = 0
 
     results.AddValue(scalar.ScalarValue(
-        results.current_page, 'pixels_recorded', 'pixels', pixels_recorded))
+        results.current_page, 'pixels_recorded', 'pixels', pixels_recorded,
+        improvement_direction=improvement_direction.DOWN))
     results.AddValue(scalar.ScalarValue(
-        results.current_page, 'pixels_rasterized', 'pixels', pixels_rasterized))
+        results.current_page, 'pixels_rasterized', 'pixels', pixels_rasterized,
+        improvement_direction=improvement_direction.DOWN))
     results.AddValue(scalar.ScalarValue(
-        results.current_page, 'rasterize_time', 'ms', rasterize_time))
+        results.current_page, 'rasterize_time', 'ms', rasterize_time,
+        improvement_direction=improvement_direction.DOWN))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'viewport_picture_size', 'bytes',
-        picture_memory_usage))
+        picture_memory_usage,
+        improvement_direction=improvement_direction.DOWN))
     results.AddValue(scalar.ScalarValue(
-        results.current_page, 'record_time', 'ms', record_time))
+        results.current_page, 'record_time', 'ms', record_time,
+        improvement_direction=improvement_direction.DOWN))
     record_time_sk_null_canvas = data['record_time_sk_null_canvas_ms']
     record_time_painting_disabled = data['record_time_painting_disabled_ms']
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'record_time_sk_null_canvas', 'ms',
-        record_time_sk_null_canvas))
+        record_time_sk_null_canvas,
+        improvement_direction=improvement_direction.DOWN))
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'record_time_painting_disabled', 'ms',
-        record_time_painting_disabled))
+        record_time_painting_disabled,
+        improvement_direction=improvement_direction.DOWN))
 
     if self._report_detailed_results:
       pixels_rasterized_with_non_solid_color = \
           data['pixels_rasterized_with_non_solid_color']
       pixels_rasterized_as_opaque = \
           data['pixels_rasterized_as_opaque']
       total_layers = data['total_layers']
       total_picture_layers = data['total_picture_layers']
       total_picture_layers_with_no_content = \
           data['total_picture_layers_with_no_content']
       total_picture_layers_off_screen = \
           data['total_picture_layers_off_screen']
       # TODO(schenney): Remove this workaround when reference builds get past
       # the change that adds this comment.
       if ('total_pictures_in_pile_size' in data):
         total_pictures_in_pile_size = data['total_pictures_in_pile_size']
       else:
         total_pictures_in_pile_size = 0
 
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_size_of_pictures_in_piles', 'bytes',
-          total_pictures_in_pile_size))
+          total_pictures_in_pile_size,
+          improvement_direction=improvement_direction.DOWN))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'pixels_rasterized_with_non_solid_color',
-          'pixels', pixels_rasterized_with_non_solid_color))
+          'pixels', pixels_rasterized_with_non_solid_color,
+          improvement_direction=improvement_direction.DOWN))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'pixels_rasterized_as_opaque', 'pixels',
-          pixels_rasterized_as_opaque))
+          pixels_rasterized_as_opaque,
+          improvement_direction=improvement_direction.DOWN))
       results.AddValue(scalar.ScalarValue(
-          results.current_page, 'total_layers', 'count', total_layers))
+          results.current_page, 'total_layers', 'count', total_layers,
+          improvement_direction=improvement_direction.DOWN))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers', 'count',
-          total_picture_layers))
+          total_picture_layers,
+          improvement_direction=improvement_direction.DOWN))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers_with_no_content', 'count',
-          total_picture_layers_with_no_content))
+          total_picture_layers_with_no_content,
+          improvement_direction=improvement_direction.DOWN))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers_off_screen', 'count',
-          total_picture_layers_off_screen))
+          total_picture_layers_off_screen,
+          improvement_direction=improvement_direction.DOWN))