Refactor BenchmarkResult.Add to take enum for data_type

tools/perf/measurements/rasterize_and_record.py

 # Copyright (c) 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.
 
 import time
 
 from metrics import smoothness
 from telemetry.page import page_measurement
+from telemetry.page import result_data_type
 
 class StatsCollector(object):
   def __init__(self, timeline):
     """
     Utility class for collecting rendering stats from timeline model.
 
     timeline -- The timeline model
     """
     self.timeline = timeline
     self.total_best_rasterize_time = 0
@@ skipping 150 matching lines @@
     self._metrics.Stop()
 
     timeline = tab.browser.GetTraceResultAndReset().AsTimelineModel()
     collector = StatsCollector(timeline)
     collector.GatherRenderingStats()
 
     rendering_stats = self._metrics.end_values
 
     results.Add('best_rasterize_time', 'seconds',
                 collector.total_best_rasterize_time / 1.e3,
-                data_type='unimportant')
+                data_type=result_data_type.UNIMPORTANT)
     results.Add('best_record_time', 'seconds',
                 collector.total_best_record_time / 1.e3,
-                data_type='unimportant')
+                data_type=result_data_type.UNIMPORTANT)
     results.Add('total_pixels_rasterized', 'pixels',
                 collector.total_pixels_rasterized,
-                data_type='unimportant')
+                data_type=result_data_type.UNIMPORTANT)
     results.Add('total_pixels_recorded', 'pixels',
                 collector.total_pixels_recorded,
-                data_type='unimportant')
+                data_type=result_data_type.UNIMPORTANT)
 
     if self.options.report_all_results:
       for k, v in rendering_stats.iteritems():
         results.Add(k, '', v)