[telemetry] Make single-benchmark measurements protected and undiscoverable.

tools/perf/measurements/blink_perf.py

-# 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.
-
-"""This measurement runs a blink performance test and reports the results."""
-
-import os
-import sys
-
-from telemetry.page import page_measurement
-from telemetry.page import page_set
-
-
-def CreatePageSetFromPath(path):
-  assert os.path.exists(path)
-
-  page_set_dict = {'pages': []}
-
-  def _AddPage(path):
-    if not path.endswith('.html'):
-      return
-    if '../' in open(path, 'r').read():
-      # If the page looks like it references its parent dir, include it.
-      page_set_dict['serving_dirs'] = [os.path.dirname(os.path.dirname(path))]
-    page_set_dict['pages'].append({'url':
-                                   'file://' + path.replace('\\', '/')})
-
-  def _AddDir(dir_path, skipped):
-    for candidate_path in os.listdir(dir_path):
-      if candidate_path == 'resources':
-        continue
-      candidate_path = os.path.join(dir_path, candidate_path)
-      if candidate_path.startswith(tuple([os.path.join(path, s)
-                                          for s in skipped])):
-        continue
-      if os.path.isdir(candidate_path):
-        _AddDir(candidate_path, skipped)
-      else:
-        _AddPage(candidate_path)
-
-  if os.path.isdir(path):
-    skipped = []
-    skipped_file = os.path.join(path, 'Skipped')
-    if os.path.exists(skipped_file):
-      for line in open(skipped_file, 'r').readlines():
-        line = line.strip()
-        if line and not line.startswith('#'):
-          skipped.append(line.replace('/', os.sep))
-    _AddDir(path, skipped)
-  else:
-    _AddPage(path)
-  return page_set.PageSet.FromDict(page_set_dict, os.getcwd() + os.sep)
-
-
-class BlinkPerf(page_measurement.PageMeasurement):
-  def __init__(self):
-    super(BlinkPerf, self).__init__('')
-    with open(os.path.join(os.path.dirname(__file__),
-                           'blink_perf.js'), 'r') as f:
-      self._blink_perf_js = f.read()
-
-  def CreatePageSet(self, args, options):
-    if len(args) < 2:
-      print 'Must specify a file or directory to run.'
-      sys.exit(1)
-
-    page_set_arg = args[1]
-
-    if not os.path.exists(page_set_arg):
-      print '%s does not exist.' % page_set_arg
-      sys.exit(1)
-
-    return CreatePageSetFromPath(page_set_arg)
-
-  @property
-  def results_are_the_same_on_every_page(self):
-    return False
-
-  def WillNavigateToPage(self, page, tab):
-    page.script_to_evaluate_on_commit = self._blink_perf_js
-
-  def CustomizeBrowserOptions(self, options):
-    options.AppendExtraBrowserArgs([
-        '--js-flags=--expose_gc',
-        '--enable-experimental-web-platform-features'
-    ])
-
-  def MeasurePage(self, page, tab, results):
-    tab.WaitForJavaScriptExpression('testRunner.isDone', 600)
-
-    log = tab.EvaluateJavaScript('document.getElementById("log").innerHTML')
-
-    for line in log.splitlines():
-      if not line.startswith('values '):
-        continue
-      parts = line.split()
-      values = [float(v.replace(',', '')) for v in parts[1:-1]]
-      units = parts[-1]
-      metric = page.display_name.split('.')[0].replace('/', '_')
-      results.Add(metric, units, values)
-      break
-
-    print log