Enable bleeding edge rendering fast paths for Silk benchmarks

tools/perf/benchmarks/thread_times.py

Index: tools/perf/benchmarks/thread_times.py
diff --git a/tools/perf/benchmarks/thread_times.py b/tools/perf/benchmarks/thread_times.py
index 06764d2c3983a126b3af458fe9c95ecd863a53b5..2b62b64223a4afe744bbf8e31121a343e646c3d1 100644
--- a/tools/perf/benchmarks/thread_times.py
+++ b/tools/perf/benchmarks/thread_times.py
@@ -3,8 +3,10 @@
 # found in the LICENSE file.
 from telemetry import test
 
+from benchmarks import silk_flags
 from measurements import thread_times
 
+
 class ThreadTimesKeySilkCases(test.Test):
   """Measures timeline metrics while performing smoothness action on key silk
   cases."""
@@ -12,6 +14,18 @@ class ThreadTimesKeySilkCases(test.Test):
   page_set = 'page_sets/key_silk_cases.json'
   options = {"report_silk_results": True}
 
+
+class ThreadTimesFastPathKeySilkCases(test.Test):
+  """Measures timeline metrics while performing smoothness action on key silk
+  cases using bleeding edge rendering fast paths."""
+  tag = 'fast_path'
+  test = thread_times.ThreadTimes
+  page_set = 'page_sets/key_silk_cases.json'
+  options = {"report_silk_results": True}
+  def CustomizeBrowserOptions(self, options):
+    silk_flags.CustomizeBrowserOptionsForFastPath(options)
+
+
 class LegacySilkBenchmark(ThreadTimesKeySilkCases):
   """Same as thread_times.key_silk_cases but with the old name."""
   @classmethod