cc: Compute draw transforms dynamically.

tools/perf/measurements/draw_properties.py

Index: tools/perf/measurements/draw_properties.py
diff --git a/tools/perf/measurements/draw_properties.py b/tools/perf/measurements/draw_properties.py
index 3021930188375570f71fa391bba76cfcd91b9394..4bf8c07887390804ab2b8e3bc6cd5130ffe85889 100644
--- a/tools/perf/measurements/draw_properties.py
+++ b/tools/perf/measurements/draw_properties.py
@@ -21,11 +21,18 @@ class DrawProperties(legacy_page_test.LegacyPageTest):
   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]
@@ -36,18 +43,24 @@ class DrawProperties(legacy_page_test.LegacyPageTest):
     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(
+    cdp_sum = self.ComputeAverageOfDurations(
         timeline_model,
-        'LayerTreeHostCommon::ComputeVisibleRectsWithPropertyTrees')
-
+        '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, 'Impl_cdp_cost', 'ms', cdp_sum,
+        description='Average time spent calculating draw properties'))
+
 
   def DidRunPage(self, platform):
     tracing_controller = platform.tracing_controller