Task Execution Duration metrics added as a new benchmark

tools/telemetry/telemetry/value/skip.py

Index: tools/telemetry/telemetry/value/skip.py
diff --git a/tools/telemetry/telemetry/value/skip.py b/tools/telemetry/telemetry/value/skip.py
index 2b03725e1cf0fad17e5e35d72a39beb34c4e4fcd..1a1db1ad789c75c11619d315103eee4645cb4b72 100644
--- a/tools/telemetry/telemetry/value/skip.py
+++ b/tools/telemetry/telemetry/value/skip.py
@@ -4,6 +4,7 @@
 
 from telemetry import value as value_module
 
+_ONLY_SUMMARIES = "Only Showing Summaries"
 
 class SkipValue(value_module.Value):
 
@@ -61,6 +62,14 @@ class SkipValue(value_module.Value):
 
     return SkipValue(**kwargs)
 
+  @property
+  def only_summaries(self):
+    return self.reason == _ONLY_SUMMARIES
+
+  @classmethod
+  def SetOnlyShowingSummaries(cls, page):
+    return cls(page, _ONLY_SUMMARIES)
+
   @classmethod
   def MergeLikeValuesFromSamePage(cls, values):
     assert False, 'Should not be called.'