Added GPU performance metrics.

tools/perf/measurements/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 measurements import timeline_controller
+from metrics import gpu_timeline
+from telemetry.core.platform import tracing_category_filter
+from telemetry.page import page_test
+from telemetry.web_perf.metrics import layout
+
+TOPLEVEL_GL_CATEGORY = 'gpu_toplevel'
+TOPLEVEL_CATEGORIES = ['disabled-by-default-gpu.device',
+                       'disabled-by-default-gpu.service']
+
+
+class GPUTimes(page_test.PageTest):
+  def __init__(self, action_name_to_run='RunPageInteractions'):
+    super(GPUTimes, self).__init__(action_name_to_run=action_name_to_run)
+    self._timeline_controller = None
+
+  def WillNavigateToPage(self, page, tab):
+    self._timeline_controller = timeline_controller.TimelineController()
+    self._timeline_controller.trace_categories = ','.join(TOPLEVEL_CATEGORIES)
+    self._timeline_controller.SetUp(page, tab)
+
+  def WillRunActions(self, page, tab):
+    self._timeline_controller.Start(tab)
+
+  def ValidateAndMeasurePage(self, page, tab, results):
+    self._timeline_controller.Stop(tab, results)
+    metric = gpu_timeline.GPUTimelineMetric()
+    metric.AddResults(self._timeline_controller.model, None,
+                      self._timeline_controller.smooth_records, results)
+
+  def CleanUpAfterPage(self, _, tab):
+    self._timeline_controller.CleanUp(tab)