Telemetry: Add simple mobile page-set with smoothness/thread-times.

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 db165cae590e581a5a000a7cb39c70181d44be8e..055f1fbd6d020aeec760326fb8db3083656b0b38 100644
--- a/tools/perf/benchmarks/thread_times.py
+++ b/tools/perf/benchmarks/thread_times.py
@@ -43,6 +43,12 @@ class ThreadTimesFastPathMobileSites(benchmark.Benchmark):
   page_set = page_sets.KeyMobileSitesPageSet
   options = {'page_label_filter' : 'fastpath'}
 
+class ThreadTimesSimpleMobileSites(benchmark.Benchmark):
+  """Measures timeline metric using smoothness action on simple mobile sites
+  http://www.chromium.org/developers/design-documents/rendering-benchmarks"""
+  test = thread_times.ThreadTimes
+  page_set = page_sets.SimpleMobileSitesPageSet
+
 
 class ThreadTimesCompositorCases(benchmark.Benchmark):
   """Measures timeline metrics while performing smoothness action on