add more polymer tests

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 66c7d4d736728bc4ff015dea49a7f7b9c4245039..afd2182dafd23dc860588d2787f5be848e68f64f 100644
--- a/tools/perf/benchmarks/thread_times.py
+++ b/tools/perf/benchmarks/thread_times.py
@@ -45,3 +45,11 @@ class LegacyFastPathBenchmark(ThreadTimesFastPathMobileSites):
   @classmethod
   def GetName(cls):
     return "fast_path.key_mobile_sites"
+
+
+class ThreadTimesPolymer(test.Test):
+  """Measures timeline metrics while performing smoothness action on
+  Polymer cases."""
+  test = thread_times.ThreadTimes
+  page_set = "page_sets/polymer.py"
+  options = { 'report_silk_results': True }