[Telemetry] Change default BattOr benchmark chrome tracing categories to be rail.

tools/perf/benchmarks/battor.py

 # Copyright 2016 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
+from telemetry.timeline import chrome_trace_category_filter
 from telemetry.web_perf import timeline_based_measurement
 import page_sets
 from telemetry import benchmark
 
 
 # TODO(rnephew): Remove BattOr naming from all benchmarks once the BattOr tests
 # are the primary means of benchmarking power.
 class _BattOrBenchmark(perf_benchmark.PerfBenchmark):
 
   def CreateTimelineBasedMeasurementOptions(self):
-    options = timeline_based_measurement.Options()
+    options = timeline_based_measurement.Options(
+        chrome_trace_category_filter.ChromeTraceCategoryFilter())

[nednguyen, 2016/08/23 17:19:28]

Oh, this may mean all the things by default.

+Zhen will know the most up to date way to specify "only use rail" category.

+    options.config.chrome_trace_config.category_filter.AddFilterString('rail')
     options.config.enable_battor_trace = True
     options.config.enable_chrome_trace = True
     options.config.enable_atrace_trace = True
     options.config.atrace_config.categories = ['sched']
     options.config.enable_cpu_trace = True
     options.config.chrome_trace_config.SetDefaultOverheadFilter()
     options.SetTimelineBasedMetrics(['powerMetric', 'clockSyncLatencyMetric'])
     return options
 
   @classmethod
@@ skipping 82 matching lines @@
     options = timeline_based_measurement.Options()
     options.config.enable_battor_trace = True
     options.config.enable_chrome_trace = False
     options.config.chrome_trace_config.SetDefaultOverheadFilter()
     options.SetTimelineBasedMetrics(['powerMetric', 'clockSyncLatencyMetric'])
     return options
 
   @classmethod
   def Name(cls):
     return 'battor.power_cases_no_chrome_trace'