[PCv2] Enable toplevel tracing category

tools/perf/benchmarks/page_cycler_v2.py

Index: tools/perf/benchmarks/page_cycler_v2.py
diff --git a/tools/perf/benchmarks/page_cycler_v2.py b/tools/perf/benchmarks/page_cycler_v2.py
index 8e577427184396adee3628b2d9e2324285405b73..8396329b4c524ed76c4ea5f0fccbdb31aa76a6a8 100644
--- a/tools/perf/benchmarks/page_cycler_v2.py
+++ b/tools/perf/benchmarks/page_cycler_v2.py
@@ -21,12 +21,25 @@ class _PageCyclerV2(perf_benchmark.PerfBenchmark):
   options = {'pageset_repeat': 2}
 
   def CreateTimelineBasedMeasurementOptions(self):
-    cat_filter = chrome_trace_category_filter.ChromeTraceCategoryFilter(
-        filter_string='blink.console,navigation,blink.user_timing,loading')
+    cat_filter = chrome_trace_category_filter.ChromeTraceCategoryFilter()
+
+    # "blink.console" is used for marking ranges in
+    # cache_temperature.MarkTelemetryInternal.
+    cat_filter.AddIncludedCategory('blink.console')
+
+    # "navigation" and "blink.user_timing" are  needed to capture core

[petrcermak, 2016/08/25 09:25:42]

nit: remove extra space before "needed".

[kouhei (in TOK), 2016/08/25 09:53:18]

Done.

+    # navigation events.
+    cat_filter.AddIncludedCategory('navigation')
+    cat_filter.AddIncludedCategory('blink.user_timing')
 
     # Below categories are needed for first-meaningful-paint computation.
     cat_filter.AddDisabledByDefault('disabled-by-default-blink.debug.layout')
     cat_filter.AddIncludedCategory('devtools.timeline')
+    cat_filter.AddIncludedCategory('loading')
+
+    # "toplevel" category is used to capture TaskQueueManager events
+    # necessary to compute time-to-interactive.
+    cat_filter.AddIncludedCategory('toplevel')
 
     tbm_options = timeline_based_measurement.Options(
         overhead_level=cat_filter)