Adding tests for diagonal scrolling in telemetry.

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 067825bd7515360db74274cdd2f29ee7e1be1e32..45ab9bab6cb8aee46cd63061c0978d83c2fbe195 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -216,6 +216,17 @@ class SmoothnessToughPinchZoomCases(benchmark.Benchmark):
     return 'smoothness.tough_pinch_zoom_cases'
 
 
+@benchmark.Enabled('chromeos')
+class SmoothnessToughScrollingWhileZoomedInCases(benchmark.Benchmark):
+  """Measures rendering statistics for pinch-zooming then diagonal scrolling"""
+  test = smoothness.Smoothness
+  page_set = page_sets.ToughScrollingWhileZoomedInCasesPageSet
+
+  @classmethod
+  def Name(cls):
+    return 'smoothness.tough_scrolling_while_zoomed_in_cases'
+
+
 @benchmark.Enabled('android')
 class SmoothnessPolymer(benchmark.Benchmark):
   """Measures rendering statistics for Polymer cases.