DevTools: Do not count events from other threads in aggregated stats.

Review URL: https://codereview.chromium.org/451993003

git-svn-id: svn://svn.chromium.org/blink/trunk@179970 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -713,6 +713,8 @@ WebInspector.TracingTimelineUIUtils._aggregatedStatsForTraceEvent = function(tot
                 break;
             if (!nextEvent.selfTime)
                 continue;
+            if (nextEvent.thread !== event.thread)
+                continue;
             if (i > index)
                 hasChildren = true;
             var category = WebInspector.TracingTimelineUIUtils.styleForTraceEvent(nextEvent.name).category.name;