Task Execution Duration metrics added as a new benchmark

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 7b322f50bd3793099281489f6020882b990b71ce..d744058d3a96becf9c4a29044e81bc5ab8d02bf8 100644
--- a/tools/perf/page_sets/tough_scheduling_cases.py
+++ b/tools/perf/page_sets/tough_scheduling_cases.py
@@ -9,7 +9,7 @@ class ToughSchedulingCasesPage(page_module.Page):
 
   def __init__(self, url, page_set):
     super(ToughSchedulingCasesPage, self).__init__(
-        url=url, page_set=page_set, credentials_path = 'data/credentials.json')
+        url=url, page_set=page_set, credentials_path='data/credentials.json')
     self.user_agent_type = 'mobile'
     self.archive_data_file = 'data/tough_scheduling_cases.json'
 
@@ -19,6 +19,12 @@ class ToughSchedulingCasesPage(page_module.Page):
     action_runner.ScrollPage()
     interaction.End()
 
+  def RunTaskExecutionTime(self, action_runner):
+    interaction = action_runner.BeginGestureInteraction(
+        'ScrollAction', is_smooth=True)
+    action_runner.ScrollPage()
+    interaction.End()
+
 
 class Page1(ToughSchedulingCasesPage):