Enable bleeding edge rendering fast paths for Silk benchmarks

tools/perf/benchmarks/rasterize_and_record_micro.py

Index: tools/perf/benchmarks/rasterize_and_record_micro.py
diff --git a/tools/perf/benchmarks/rasterize_and_record_micro.py b/tools/perf/benchmarks/rasterize_and_record_micro.py
index 6877d5ef7c2dd78c188596766985fba5d2f74e43..892449ef6575767145ec4cbed63758962e2ad634 100644
--- a/tools/perf/benchmarks/rasterize_and_record_micro.py
+++ b/tools/perf/benchmarks/rasterize_and_record_micro.py
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+from benchmarks import silk_flags
 from measurements import rasterize_and_record_micro
 from telemetry import test
 
@@ -29,3 +30,16 @@ class RasterizeAndRecordMicroKeySilkCases(test.Test):
   http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
   test = rasterize_and_record_micro.RasterizeAndRecordMicro
   page_set = 'page_sets/key_silk_cases.json'
+
+
+class RasterizeAndRecordMicroFastPathKeySilkCases(test.Test):
+  """Measures rasterize and record performance on the silk sites.
+
+  Uses bleeding edge rendering fast paths.
+
+  http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
+  tag = 'fast_path'
+  test = rasterize_and_record_micro.RasterizeAndRecordMicro
+  page_set = 'page_sets/key_silk_cases.json'
+  def CustomizeBrowserOptions(self, options):
+    silk_flags.CustomizeBrowserOptionsForFastPath(options)