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

tools/perf/benchmarks/pica.py

Index: tools/perf/benchmarks/pica.py
diff --git a/tools/perf/benchmarks/pica.py b/tools/perf/benchmarks/pica.py
index eff3866f45b9f68e99be563adc656d4769664fc3..ab33b9631191f6736ed7e6661cb12ce3d659c8ac 100644
--- a/tools/perf/benchmarks/pica.py
+++ b/tools/perf/benchmarks/pica.py
@@ -5,6 +5,7 @@
 import page_sets
 from telemetry import benchmark
 from telemetry.page import page_measurement
+from telemetry.value import scalar
 
 class _PicaMeasurement(page_measurement.PageMeasurement):
   def CustomizeBrowserOptions(self, options):
@@ -14,7 +15,8 @@ class _PicaMeasurement(page_measurement.PageMeasurement):
 
   def MeasurePage(self, _, tab, results):
     result = int(tab.EvaluateJavaScript('__polymer_ready_time'))
-    results.Add('Total', 'ms', result)
+    results.AddValue(scalar.ScalarValue(
+        results.current_page, 'Total', 'ms', result))
 
 
 class Pica(benchmark.Benchmark):