Re-implements start_with_url.* benchmarks as start_with_url2.* using TBM

tools/perf/benchmarks/start_with_url2.py

+# Copyright 2015 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 core import perf_benchmark
+import page_sets
+
+from telemetry import benchmark
+from telemetry.timeline import tracing_category_filter
+from telemetry.web_perf import timeline_based_measurement
+from telemetry.web_perf.metrics import startup
+
+
+class _StartWithUrlTBM(perf_benchmark.PerfBenchmark):
+  """Measures time to start Chrome with startup URLs"""

[pasko, 2015/11/19 13:08:17]

nit: period, same below

[gabadie, 2015/11/19 16:25:25]

Done.

+
+  page_set = page_sets.StartupPagesPageSetTBM
+
+  @classmethod
+  def Name(cls):
+    # TODO(gabadie): We don't want to replace start_with_url.* yet.

[pasko, 2015/11/19 13:08:17]

please avoid 'We'. You could say:

TODO(gabadie): change to start_with_url.* after confirming that both benchmarks
produce the same results.

[gabadie, 2015/11/19 16:25:25]

Done.

+    return 'start_with_url2.startup_pages'
+
+  def SetExtraBrowserOptions(self, options):
+    options.AppendExtraBrowserArgs([
+        '--enable-stats-collection-bindings'
+    ])
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    startup_category_filter = tracing_category_filter.TracingCategoryFilter(
+        filter_string='startup,blink.user_timing')
+    options = timeline_based_measurement.Options(
+        overhead_level=startup_category_filter)
+    options.SetTimelineBasedMetrics(
+        [startup.StartupTimelineMetric()])
+    return options
+
+
+@benchmark.Enabled('has tabs')
+@benchmark.Enabled('android')
+@benchmark.Disabled('chromeos', 'linux', 'mac', 'win')
+class StartWithUrlColdTBM(_StartWithUrlTBM):
+  """Measures time to start Chrome cold with startup URLs"""
+
+  options = {'pageset_repeat': 5}
+
+  def SetExtraBrowserOptions(self, options):
+      options.clear_sytem_cache_for_browser_and_profile_on_start = True
+      super(StartWithUrlColdTBM, self).SetExtraBrowserOptions(options)
+
+  @classmethod
+  def Name(cls):
+    return 'start_with_url2.cold.startup_pages'
+
+
+@benchmark.Enabled('has tabs')
+@benchmark.Enabled('android')
+@benchmark.Disabled('chromeos', 'linux', 'mac', 'win')
+class StartWithUrlWarmTBM(_StartWithUrlTBM):
+  """Measures stimetime to start Chrome warm with startup URLs"""
+
+  options = {'pageset_repeat': 10}

[pasko, 2015/11/19 13:08:17]

Why 10 for warm and 5 for cold? Is this based on some rule related to how long
the tests run. Apologies if it was discussed already, I did not pay much
attention.

[nednguyen, 2015/11/19 15:56:46]

For now, let's make these number the same as legacy benchmarks for the ease of
calibration.

[pasko, 2015/11/20 13:35:49]

Acknowledged.

+
+  @classmethod
+  def Name(cls):
+    return 'start_with_url2.warm.startup_pages'