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 711c53d363d6bb1870ba3d124e241fedfffd8038..a3e12e8e204d7aef0749ccbbb79745443114d4da 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -185,6 +185,17 @@ class SmoothnessToughPinchZoomCases(benchmark.Benchmark):
     return 'smoothness.tough_pinch_zoom_cases'
 
 
+@benchmark.Enabled('android', '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.