DevTools: move recurring flag into AsyncTask, control cancelation from embedder only.

third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js

Index: third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js
diff --git a/third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js b/third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js
index e85439fe65bfda124757908bc255fff80bf977ed..c76b09bbc43fdd2a00341e99dd112c6b0f79313a 100644
--- a/third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js
+++ b/third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js
@@ -337,7 +337,8 @@ Timeline.TimelineFlameChartDataProvider = class {
       var level = this._currentLevel + openEvents.length;
       if (flowEventsEnabled)
         this._appendFlowEvent(e, level);
-      this._appendEvent(e, level);
+      if (e.phase !== SDK.TracingModel.Phase.FlowEnd)
+        this._appendEvent(e, level);
       if (!isExtension && TimelineModel.TimelineModel.isMarkerEvent(e))
         this._timelineData.entryTotalTimes[this._entryData.length] = undefined;
 
@@ -755,6 +756,8 @@ Timeline.TimelineFlameChartDataProvider = class {
      * @param {number} flowIndex
      */
     function pushEndFlow(event, flowIndex) {
+      if (flowIndex < 0)

[caseq, 2017/03/14 02:09:43]

How can this happen?

[pfeldman, 2017/03/14 02:29:24]

That's a way to filter out things. Filtering in the index-based array is tricky.

+        return;
       timelineData.flowEndTimes[flowIndex] = event.startTime;
       timelineData.flowEndLevels[flowIndex] = level;
     }