[Telemetry] Fix kraken result value type from r281894.

tools/perf/benchmarks/kraken.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 Mozilla's Kraken JavaScript benchmark."""
 
 import os
 
 from metrics import power
 from telemetry import benchmark
 from telemetry.page import page_measurement
 from telemetry.page import page_set
+from telemetry.value import list_of_scalar_values
 from telemetry.value import scalar
 
 
 def _Mean(l):
   return float(sum(l)) / len(l) if len(l) > 0 else 0.0
 
 
 class _KrakenMeasurement(page_measurement.PageMeasurement):
   def __init__(self):
     super(_KrakenMeasurement, self).__init__()
@@ skipping 18 matching lines @@
 
     js_get_results = """
 var formElement = document.getElementsByTagName("input")[0];
 decodeURIComponent(formElement.value.split("?")[1]);
 """
     result_dict = eval(tab.EvaluateJavaScript(js_get_results))
     total = 0
     for key in result_dict:
       if key == 'v':
         continue
-      results.AddValue(scalar.ScalarValue(
+      results.AddValue(list_of_scalar_values.ListOfScalarValues(
           results.current_page, key, 'ms', result_dict[key], important=False))
       total += _Mean(result_dict[key])
+
+    # TODO(tonyg/nednguyen): This measurement shouldn't calculate Total. The
+    # results system should do that for us.
     results.AddValue(scalar.ScalarValue(
         results.current_page, 'Total', 'ms', total))
 
 
 class Kraken(benchmark.Benchmark):
   """Mozilla's Kraken JavaScript benchmark."""
   test = _KrakenMeasurement
 
   def CreatePageSet(self, options):
     ps = page_set.PageSet(
       archive_data_file='../page_sets/data/kraken.json',
       file_path=os.path.abspath(__file__))
     ps.AddPageWithDefaultRunNavigate(
       'http://krakenbenchmark.mozilla.org/kraken-1.1/driver.html')
     return ps