[telemetry] Add a V8GCTimes measurement and benchmarks.

tools/telemetry/telemetry/web_perf/timeline_interaction_record.py

Index: tools/telemetry/telemetry/web_perf/timeline_interaction_record.py
diff --git a/tools/telemetry/telemetry/web_perf/timeline_interaction_record.py b/tools/telemetry/telemetry/web_perf/timeline_interaction_record.py
index 8c1c8170317329a2e3f10587cd732138064d8e77..8b43909f04afc5c78814c0e9c11397c6fc99ab5a 100644
--- a/tools/telemetry/telemetry/web_perf/timeline_interaction_record.py
+++ b/tools/telemetry/telemetry/web_perf/timeline_interaction_record.py
@@ -7,8 +7,6 @@ import re
 import telemetry.timeline.bounds as timeline_bounds
 from telemetry import decorators
 
-# Enables the fast metric for this interaction
-IS_FAST = 'is_fast'
 # Enables the responsiveness metric for this interaction
 IS_RESPONSIVE = 'is_responsive'
 # Enables the smoothness metric for this interaction
@@ -17,7 +15,6 @@ IS_SMOOTH = 'is_smooth'
 REPEATABLE = 'repeatable'
 
 METRICS = [
-    IS_FAST,
     IS_RESPONSIVE,
     IS_SMOOTH
 ]
@@ -88,7 +85,7 @@ class TimelineInteractionRecord(object):
   is currently done by pushing markers into the console.time/timeEnd API: this
   for instance can be issued in JS:
 
-     var str = 'Interaction.SendEmail/is_smooth,is_responsive,is_fast';
+     var str = 'Interaction.SendEmail/is_smooth,is_responsive';
      console.time(str);
      setTimeout(function() {
        console.timeEnd(str);
@@ -96,11 +93,10 @@ class TimelineInteractionRecord(object):
 
   When run with perf.measurements.timeline_based_measurement running, this will
   then cause a TimelineInteractionRecord to be created for this range with
-  smoothness, responsive, and fast metrics reported for the marked up 1000ms
+  smoothness and responsive metrics reported for the marked up 1000ms
   time-range.
 
   The valid interaction flags are:
-     * is_fast: Enables the fast metric
      * is_responsive: Enables the responsiveness metric
      * is_smooth: Enables the smoothness metric
      * repeatable: Allows other interactions to use the same label
@@ -128,10 +124,6 @@ class TimelineInteractionRecord(object):
     return self._end
 
   @property
-  def is_fast(self):
-    return IS_FAST in self._flags
-
-  @property
   def is_responsive(self):
     return IS_RESPONSIVE in self._flags