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

tools/perf/benchmarks/jsgamebench.py

Index: tools/perf/benchmarks/jsgamebench.py
diff --git a/tools/perf/benchmarks/jsgamebench.py b/tools/perf/benchmarks/jsgamebench.py
index 8d1c8c16c8a26783dde0c19b50f277e4d802336e..cf057d82f82811809bf3eb0cc55790e4af088b56 100644
--- a/tools/perf/benchmarks/jsgamebench.py
+++ b/tools/perf/benchmarks/jsgamebench.py
@@ -15,6 +15,7 @@ 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):
@@ -28,7 +29,8 @@ class _JsgamebenchMeasurement(page_measurement.PageMeasurement):
 
     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