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

tools/perf/benchmarks/smoothness.py

Index: tools/perf/benchmarks/smoothness.py
diff --git a/tools/perf/benchmarks/smoothness.py b/tools/perf/benchmarks/smoothness.py
index 1c5f4991cefd9b383b0fa32abda6520e4ed8fa2c..ba2bebbc2ef412ec387484f2bd877a9cc47abf5c 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -116,6 +116,15 @@ class SmoothnessFastPathGpuRasterizationKeySilkCases(
 
 
 @benchmark.Enabled('android')
+class SmoothnessSimpleMobilePages(benchmark.Benchmark):
+  """Measures rendering statistics for pinch-zooming into the tough pinch zoom
+  cases
+  """
+  test = smoothness.Smoothness
+  page_set = page_sets.SimpleMobileSitesPageSet
+
+
+@benchmark.Enabled('android')
 class SmoothnessToughPinchZoomCases(benchmark.Benchmark):
   """Measures rendering statistics for pinch-zooming into the tough pinch zoom
   cases