cc: Compute draw transforms dynamically.

tools/perf/measurements/draw_properties.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 telemetry.page import legacy_page_test
 from telemetry.timeline import model
 from telemetry.timeline import tracing_config
 from telemetry.value import scalar
 
 
 class DrawProperties(legacy_page_test.LegacyPageTest):
 
   def __init__(self):
     super(DrawProperties, self).__init__()
 
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs([
         '--enable-prefer-compositing-to-lcd-text',
     ])
 
   def WillNavigateToPage(self, page, tab):
     del page  # unused
     config = tracing_config.TracingConfig()
-    config.chrome_trace_config.category_filter.AddDisabledByDefault(
-        'disabled-by-default-cc.debug.cdp-perf')
+    config.chrome_trace_config.category_filter.AddIncludedCategory('cc')
     config.enable_chrome_trace = True
     tab.browser.platform.tracing_controller.StartTracing(config)
 
+  def ComputeTotalDurations(self, timeline_model, name):
+    events = timeline_model.GetAllEventsOfName(name)
+    event_durations = [d.duration for d in events]
+    assert event_durations, 'Failed to find durations'
+
+    duration_sum = sum(event_durations)
+    return duration_sum
+
   def ComputeAverageOfDurations(self, timeline_model, name):
     events = timeline_model.GetAllEventsOfName(name)
     event_durations = [d.duration for d in events]
     assert event_durations, 'Failed to find durations'
 
     duration_sum = sum(event_durations)
     duration_count = len(event_durations)
     duration_avg = duration_sum / duration_count
     return duration_avg
 
+  def CountNumbers(self, timeline_model, name):
+    events = timeline_model.GetAllEventsOfName(name)
+
+    duration_count = len(events)
+    return duration_count
+
   def ValidateAndMeasurePage(self, page, tab, results):
     del page  # unused
     timeline_data = tab.browser.platform.tracing_controller.StopTracing()
     timeline_model = model.TimelineModel(timeline_data)
 
-    pt_avg = self.ComputeAverageOfDurations(
+    bld_sum = self.ComputeAverageOfDurations(
         timeline_model,
-        'LayerTreeHostCommon::ComputeVisibleRectsWithPropertyTrees')
+        'LayerTreeHost::UpdateLayers::BuildPropertyTrees')
+
+    cdp_sum = self.ComputeAverageOfDurations(
+        timeline_model,
+        'LayerTreeImpl::UpdateDrawProperties::CalculateDrawProperties')
 
     results.AddValue(scalar.ScalarValue(
-        results.current_page, 'PT_avg_cost', 'ms', pt_avg,
-        description='Average time spent processing property trees'))
+        results.current_page, 'PT_build_cost', 'ms', bld_sum,
+        description='Total time spent building property trees'))
+
+    results.AddValue(scalar.ScalarValue(
+        results.current_page, 'Impl_cdp_cost', 'ms', cdp_sum,
+        description='Total time spent calculating draw properties'))
 
   def DidRunPage(self, platform):
     tracing_controller = platform.tracing_controller
     if tracing_controller.is_tracing_running:
       tracing_controller.StopTracing()