Added GPU performance metrics.

tools/perf/benchmarks/gpu_times.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 metrics import gpu_timeline
+import page_sets
+from telemetry import benchmark
+from telemetry.core.platform import tracing_category_filter
+from telemetry.web_perf import timeline_based_measurement
+
+TOPLEVEL_GL_CATEGORY = 'gpu_toplevel'
+TOPLEVEL_CATEGORIES = ['disabled-by-default-gpu.device',
+                       'disabled-by-default-gpu.service']
+
+
+def _GetGPUTimelineMetric(_):
+      return [gpu_timeline.GPUTimelineMetric()]
+
+
+class _GPUTimes(benchmark.Benchmark):
+  def CreateTimelineBasedMeasurementOptions(self):
+    cat_string = ','.join(TOPLEVEL_CATEGORIES)
+    cat_filter = tracing_category_filter.TracingCategoryFilter(cat_string)
+
+    return timeline_based_measurement.Options(
+        overhead_level=cat_filter,
+        get_metrics_from_flags_callback=_GetGPUTimelineMetric)
+
+
+@benchmark.Enabled('android')
+class GPUTimesKeyMobileSites(_GPUTimes):
+  """Measures GPU timeline metric on key mobile sites."""
+  page_set = page_sets.KeyMobileSitesSmoothPageSet
+
+
+class GPUTimesTop25Sites(_GPUTimes):
+  """Measures GPU timeline metric for the top 25 sites."""
+  page_set = page_sets.Top25SmoothPageSet