Refactor BenchmarkResult.Add to take enum for data_type

tools/perf/benchmarks/dom_perf.py

 # Copyright (c) 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 json
 import math
 import os
 
 from telemetry import test
 from telemetry.core import util
 from telemetry.page import page_measurement
 from telemetry.page import page_set
-
+from telemetry.page import result_data_type
 
 def _GeometricMean(values):
   """Compute a rounded geometric mean from an array of values."""
   if not values:
     return None
   # To avoid infinite value errors, make sure no value is less than 0.001.
   new_values = []
   for value in values:
     if value > 0.001:
       new_values.append(value)
@@ skipping 20 matching lines @@
     try:
       def _IsDone():
         return tab.GetCookieByName('__domperf_finished') == '1'
       util.WaitFor(_IsDone, 600, poll_interval=5)
 
       data = json.loads(tab.EvaluateJavaScript('__domperf_result'))
       for suite in data['BenchmarkSuites']:
         # Skip benchmarks that we didn't actually run this time around.
         if len(suite['Benchmarks']) or suite['score']:
           results.Add(SCORE_TRACE_NAME, SCORE_UNIT,
-                      suite['score'], suite['name'], 'unimportant')
+                      suite['score'], suite['name'],
+                      result_data_type.UNIMPORTANT)
     finally:
       tab.EvaluateJavaScript('document.cookie = "__domperf_finished=0"')
 
   def DidRunTest(self, tab, results):
     # Now give the geometric mean as the total for the combined runs.
     scores = []
     for result in results.page_results:
       scores.append(result[SCORE_TRACE_NAME].output_value)
     total = _GeometricMean(scores)
     results.AddSummary(SCORE_TRACE_NAME, SCORE_UNIT, total, 'Total')
@@ skipping 17 matching lines @@
           { 'url': base_page + 'CreateNodes' },
           { 'url': base_page + 'DOMDivWalk' },
           { 'url': base_page + 'DOMTable' },
           { 'url': base_page + 'DOMWalk' },
           { 'url': base_page + 'Events' },
           { 'url': base_page + 'Get+Elements' },
           { 'url': base_page + 'GridSort' },
           { 'url': base_page + 'Template' }
           ]
         }, dom_perf_dir)