[Telemetry] Utilize CreatePageSet for benchmarks with one page set.

tools/perf/perf_tools/jsgamebench.py

 # Copyright (c) 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."""
+
+import os
+
 from telemetry.core import util
 from telemetry.page import page_measurement
+from telemetry.page import page_set
 
 class JsGameBench(page_measurement.PageMeasurement):
+  def CreatePageSet(self, options):
+    return page_set.PageSet.FromDict({
+        'archive_data_file': '../data/jsgamebench.json',
+        'pages': [
+          { 'url': 'http://localhost/' }
+          ]
+        }, os.path.abspath(__file__))
+
   def MeasurePage(self, _, tab, results):
     tab.ExecuteJavaScript('UI.call({}, "perftest")')
 
     js_is_done = 'document.getElementById("perfscore0") != null'
     def _IsDone():
       return bool(tab.EvaluateJavaScript(js_is_done))
     util.WaitFor(_IsDone, 1200)
 
     js_get_results = 'document.getElementById("perfscore0").innerHTML'
     result = int(tab.EvaluateJavaScript(js_get_results))
     results.Add('Score', 'score (bigger is better)', result)