Update service_worker to use results.AddValue(...)

BUG=391943
TBR=nduca@chromium.org

Review URL: https://codereview.chromium.org/375703008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@281933 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/benchmarks/service_worker.py

@@ -5,6 +5,7 @@
 import page_sets
 from telemetry import benchmark
 from telemetry.page import page_measurement
+from telemetry.value import scalar
 
 
 class _ServiceWorkerMeasurement(page_measurement.PageMeasurement):
@@ -17,7 +18,8 @@ class _ServiceWorkerMeasurement(page_measurement.PageMeasurement):
     tab.WaitForJavaScriptExpression('window.done', 40)
     json = tab.EvaluateJavaScript('window.results')
     for key, value in json.iteritems():
-      results.Add(key, value['units'], value['value'])
+      results.AddValue(scalar.ScalarValue(
+          results.current_page, key, value['units'], value['value']))
 
 
 @benchmark.Disabled