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

tools/perf/benchmarks/jsgamebench.py

 # Copyright 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 Facebook's JSGameBench benchmark.
 
 As of May 14, 2014, JSGameBench is no longer maintained. See README.md:
 https://github.com/facebookarchive/jsgamebench
 
 The benchmark is kept here for historical purposes but is disabled on the bots.
 """
 
 import os
 
 from telemetry import benchmark
 from telemetry.page import page_measurement
 from telemetry.page import page_set
+from telemetry.value import scalar
 
 
 class _JsgamebenchMeasurement(page_measurement.PageMeasurement):
   def __init__(self):
     super(_JsgamebenchMeasurement, self).__init__()
 
   def MeasurePage(self, page, tab, results):
     tab.ExecuteJavaScript('UI.call({}, "perftest")')
     tab.WaitForJavaScriptExpression(
         'document.getElementById("perfscore0") != null', 1800)
 
     js_get_results = 'document.getElementById("perfscore0").innerHTML'
     result = int(tab.EvaluateJavaScript(js_get_results))
-    results.Add('Score', 'score (bigger is better)', result)
+    results.AddValue(scalar.ScalarValue(
+        results.current_page, 'Score', 'score (bigger is better)', result))
 
 
 @benchmark.Disabled
 class Jsgamebench(benchmark.Benchmark):
   """Counts how many animating sprites can move around on the screen at once."""
   test = _JsgamebenchMeasurement
 
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
       archive_data_file='../page_sets/data/jsgamebench.json',
       file_path=os.path.dirname(__file__))
     ps.AddPageWithDefaultRunNavigate('http://localhost/')
     return ps