Refactor BenchmarkResult.Add to take enum for data_type

tools/perf/benchmarks/spaceport.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.
 
 """Runs spaceport.io's PerfMarks benchmark."""
 
 import logging
 import os
 
 from telemetry import test
 from telemetry.core import util
 from telemetry.page import page_measurement
+from telemetry.page import result_data_type
 from telemetry.page import page_set
 
 
 class SpaceportMeasurement(page_measurement.PageMeasurement):
   def CustomizeBrowserOptions(self, options):
     options.extra_browser_args.extend(['--disable-gpu-vsync'])
 
   def MeasurePage(self, _, tab, results):
     util.WaitFor(lambda: tab.EvaluateJavaScript(
         '!document.getElementById("start-performance-tests").disabled'), 60)
@@ skipping 19 matching lines @@
         logging.info('Completed measurement %d of %d'
                      % (num_tests_complete[0],
                         num_tests_in_measurement))
       return num_tests_complete[0] >= num_tests_in_measurement
     util.WaitFor(_IsDone, 1200, poll_interval=5)
 
     result_dict = eval(tab.EvaluateJavaScript(js_get_results))
     for key in result_dict:
       chart, trace = key.split('.', 1)
       results.Add(trace, 'objects (bigger is better)', float(result_dict[key]),
-                  chart_name=chart, data_type='unimportant')
+                  chart_name=chart, data_type=result_data_type.UNIMPORTANT)
     results.Add('Score', 'objects (bigger is better)',
                 [float(x) for x in result_dict.values()])
 
 
 class Spaceport(test.Test):
   """spaceport.io's PerfMarks benchmark."""
   test = SpaceportMeasurement
 
   def CreatePageSet(self, options):
     spaceport_dir = os.path.join(util.GetChromiumSrcDir(), 'chrome', 'test',
         'data', 'third_party', 'spaceport')
     return page_set.PageSet.FromDict(
         {'pages': [{'url': 'file:///index.html'}]},
         spaceport_dir)