Refactor BenchmarkResult.Add to take enum for data_type

tools/perf/benchmarks/sunspider.py

Index: tools/perf/benchmarks/sunspider.py
===================================================================
--- tools/perf/benchmarks/sunspider.py	(revision 222891)
+++ tools/perf/benchmarks/sunspider.py	(working copy)
@@ -10,7 +10,11 @@
 from telemetry.page import page_measurement
 from telemetry.page import page_set
 
+# Get build scripts into our path.
+util.AddDirToPythonPath(util.GetChromiumSrcDir(), 'build', 'util', 'lib')
+from common import perf_result_data_type # pylint: disable=F0401
 
+
 class SunspiderMeasurement(page_measurement.PageMeasurement):
   def MeasurePage(self, _, tab, results):
     js_is_done = ('window.location.pathname.indexOf("results.html") >= 0'
@@ -33,7 +37,8 @@
         total += value
       totals.append(total)
     for key, values in r.iteritems():
-      results.Add(key, 'ms', values, data_type='unimportant')
+      results.Add(key, 'ms', values,
+                  data_type=perf_result_data_type.UNIMPORTANT)
     results.Add('Total', 'ms', totals)