Refactor BenchmarkResult.Add to take enum for data_type

tools/perf/measurements/rasterize_and_record.py

Index: tools/perf/measurements/rasterize_and_record.py
===================================================================
--- tools/perf/measurements/rasterize_and_record.py	(revision 217866)
+++ tools/perf/measurements/rasterize_and_record.py	(working copy)
@@ -6,6 +6,7 @@
 
 from metrics import smoothness
 from telemetry.page import page_measurement
+from telemetry.page import result_data_type
 
 class StatsCollector(object):
   def __init__(self, timeline):
@@ -176,16 +177,16 @@
 
     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():