Automate Kraken benchmark with Chrome Remote Control.

tools/perf/perf_tools/kraken.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.
+
+from chrome_remote_control import multi_page_benchmark
+from chrome_remote_control import util
+
+def _Mean(l):
+  return float(sum(l)) / len(l) if len(l) > 0 else 0.0
+
+class Kraken(multi_page_benchmark.MultiPageBenchmark):
+  def MeasurePage(self, _, tab, results):
+    js_is_done = """
+document.title.indexOf("Results") != -1 && document.readyState == "complete"
+"""
+    def _IsDone():
+      return bool(tab.runtime.Evaluate(js_is_done))
+    util.WaitFor(_IsDone, 300)
+
+    js_get_results = """
+var formElement = document.getElementsByTagName("input")[0];
+decodeURIComponent(formElement.value.split("?")[1]);
+"""
+    result_dict = eval(tab.runtime.Evaluate(js_get_results))
+    total = 0
+    for key in result_dict:
+      if key == 'v':
+        continue
+      results.Add(key, 'ms', result_dict[key])
+      total += _Mean(result_dict[key])
+    results.Add('Total', 'ms', total)