CL for perf tryjob on mac

tools/perf/benchmarks/rail.py

Index: tools/perf/benchmarks/rail.py
diff --git a/tools/perf/benchmarks/rail.py b/tools/perf/benchmarks/rail.py
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index 0000000000000000000000000000000000000000..d4da284e037a758a62ffb2365d0be17983b252e8
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+++ b/tools/perf/benchmarks/rail.py
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+# 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.
+import os
+
+
+from core import perf_benchmark
+
+from telemetry.timeline import tracing_category_filter
+from telemetry.value import scalar
+from telemetry.value import failure
+from telemetry.web_perf import trace_mappers_based_measurement
+
+import page_sets
+
+class RailMapperHandler(trace_mappers_based_measurement.TraceMapperHandler):
+  _weather_report_map_func_dir = os.path.join(
+      os.path.dirname(__file__), '..', '..', '..', 'third_party',
+      'catapult', 'perf_insights', 'perf_insights', 'mappers',
+      'weather_report_map_function.html')
+  def __init__(self):
+    super(RailMapperHandler, self).__init__(
+        trace_mapper_path=self._weather_report_map_func_dir)
+
+  def AddResults(self, pi_results, page, results):
+    wr_value = pi_results.FindValueNamed('wr')
+    try:
+      rail_score = wr_value['irTree']['overallScore']
+      results.AddValue(
+          scalar.ScalarValue(
+              page=results.current_page, name='RailScore', units='percent',
+              value=rail_score, important=True, description='RAIL score.'))
+    except Exception:
+      results.AddValue(
+          failure.FromMessage(
+              page=page, message='Failed to compute RAIL score.'))
+
+
+class RailTop25Sites(perf_benchmark.PerfBenchmark):
+  """Measures GPU timeline metric for the top 25 sites."""
+  page_set = page_sets.Top25SmoothPageSet
+  test = trace_mappers_based_measurement.TraceMapperBasedMeasurement
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    options = trace_mappers_based_measurement.Options(
+        tracing_category_filter.CreateDebugOverheadFilter())
+    options.AddTraceMapperHandlers(RailMapperHandler())
+    return options
+
+  @classmethod
+  def Name(cls):
+    return 'rail.top_25_smooth'