Add tracing benchmark

This CL adds benchmark for Chrome tracing system. It
includes several typical trace settings. More scenarios can
be added if needed.

Benchmark run time on local workstation (linux):
- tracing.tracing_debug_overhead with Top10PageSet: 3m33s

Design doc: https://goo.gl/VYIBqT

BUG=catapult:#2078
CQ_EXTRA_TRYBOTS=tryserver.chromium.perf:android_s5_perf_cq;tryserver.chromium.perf:winx64_10_perf_cq;tryserver.chromium.perf:mac_retina_perf_cq;tryserver.chromium.perf:linux_perf_cq

Review URL: https://codereview.chromium.org/1776583003

Cr-Commit-Position: refs/heads/master@{#381255}

1 files changed, 24 insertions, 0 deletions

diff --git a/tools/perf/benchmarks/tracing.py b/tools/perf/benchmarks/tracing.py
new file mode 100644
index 0000000..b0b7223
--- /dev/null
+++ b/tools/perf/benchmarks/tracing.py
@@ -0,0 +1,24 @@
+# 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.web_perf import timeline_based_measurement
+
+import page_sets
+
+
+class TracingWithDebugOverhead(perf_benchmark.PerfBenchmark):
+
+  page_set = page_sets.Top10PageSet
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    options = timeline_based_measurement.Options(
+        timeline_based_measurement.DEBUG_OVERHEAD_LEVEL)
+    options.SetTimelineBasedMetric('system_health/tracing_metric.html')
+    return options
+
+  @classmethod
+  def Name(cls):
+    return 'tracing.tracing_with_debug_overhead'