Add simple pepper plugin telemetry test

tools/perf/page_sets/tough_scheduling_cases.py

Index: tools/perf/page_sets/tough_scheduling_cases.py
diff --git a/tools/perf/page_sets/tough_scheduling_cases.py b/tools/perf/page_sets/tough_scheduling_cases.py
index 4cc5cb4f9e5330d67dad89046c019c67a89aeaca..e4708df4f0f47b3ef6bf329bc95e4736213cc1dd 100644
--- a/tools/perf/page_sets/tough_scheduling_cases.py
+++ b/tools/perf/page_sets/tough_scheduling_cases.py
@@ -318,6 +318,30 @@ class Page20(ToughSchedulingCasesPage):
         'scroll_distance_function': 'function() { return 400; }'
       }))
 
+class Page21(ToughSchedulingCasesPage):
+
+  """ Why: Simple pepper plugin for touch drawing """
+
+  def __init__(self, page_set):
+    super(Page21, self).__init__(
+        url='file://tough_scheduling_cases/simple_pepper_plugin.html',
+        page_set=page_set)
+
+  def RunSmoothness(self, action_runner):
+    # Wait until the page and the plugin module are loaded.
+    action_runner.RunAction(WaitAction(
+      {
+        'javascript': ('pageLoaded === true && moduleLoaded === true')
+      }))
+    action_runner.RunAction(ScrollAction(
+      {
+            'scroll_requires_touch': True,
+            'direction': 'up',
+            'top_start_percentage': 0.3,
+            'speed': 200,
+            'scroll_distance_function': 'function() { return 500; }',
+      }))
+
 class EmptyTouchHandlerPage(ToughSchedulingCasesPage):
 
   """ Why: Scrolling on a page with a touch handler that consumes no events but
@@ -403,6 +427,7 @@ class ToughSchedulingCasesPageSet(page_set_module.PageSet):
     self.AddPage(Page18(self))
     self.AddPage(Page19(self))
     self.AddPage(Page20(self))
+    self.AddPage(Page21(self))
     # Why: Baseline for scrolling in the presence of a no-op touch handler
     self.AddPage(EmptyTouchHandlerPage(
       name='baseline',
@@ -448,4 +473,3 @@ class ToughSchedulingCasesPageSet(page_set_module.PageSet):
       slow_handler=True,
       bounce=True,
       page_set=self))
-