Convert dom_perf into a telemetry test.

BUG=230435

NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/15065003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@199545 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/page_sets/dom_perf.json

@@ -0,0 +1,15 @@
+{
+  "description": "Dom Perf benchmark",
+  "pages": [
+    { "url": "file:///../../../data/dom_perf/run.html?run=Accessors&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=CloneNodes&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=CreateNodes&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=DOMDivWalk&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=DOMTable&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=DOMWalk&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=Events&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=Get+Elements&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=GridSort&reportInJS=1" },
+    { "url": "file:///../../../data/dom_perf/run.html?run=Template&reportInJS=1" }
+  ]
+}

tools/perf/perf_tools/dom_perf.py

@@ -0,0 +1,61 @@
+# Copyright (c) 2013 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.
+
+import json
+import math
+
+from telemetry.core import util
+from telemetry.page import page_measurement
+
+
+def _GeometricMean(values):
+  """Compute a rounded geometric mean from an array of values."""
+  if not values:
+    return None
+  # To avoid infinite value errors, make sure no value is less than 0.001.
+  new_values = []
+  for value in values:
+    if value > 0.001:
+      new_values.append(value)
+    else:
+      new_values.append(0.001)
+  # Compute the sum of the log of the values.
+  log_sum = sum(map(math.log, new_values))
+  # Raise e to that sum over the number of values.
+  mean = math.pow(math.e, (log_sum / len(new_values)))
+  # Return the rounded mean.
+  return int(round(mean))
+
+
+SCORE_UNIT = 'score (bigger is better)'
+SCORE_TRACE_NAME = 'score'
+
+
+class DomPerf(page_measurement.PageMeasurement):
+  @property
+  def results_are_the_same_on_every_page(self):
+    return False
+
+  def WillNavigateToPage(self, page, tab):
+    tab.EvaluateJavaScript('document.cookie = "__domperf_finished=0"')
+
+  def MeasurePage(self, page, tab, results):
+    def _IsDone():
+      return tab.GetCookieByName('__domperf_finished') == '1'
+    util.WaitFor(_IsDone, 600, poll_interval=5)
+
+    data = json.loads(tab.EvaluateJavaScript('__domperf_result'))
+    for suite in data['BenchmarkSuites']:
+      # Skip benchmarks that we didn't actually run this time around.
+      if len(suite['Benchmarks']) or suite['score']:
+        results.Add(SCORE_TRACE_NAME, SCORE_UNIT,
+                    suite['score'], suite['name'], 'unimportant')
+
+  def DidRunPageSet(self, tab, results):
+    # Now give the geometric mean as the total for the combined runs.
+    scores = []
+    for result in results.page_results:
+      scores.append(result[SCORE_TRACE_NAME].output_value)
+    total = _GeometricMean(scores)
+    results.AddSummary(SCORE_TRACE_NAME, SCORE_UNIT, total, 'Total')