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

Source/devtools/front_end/timeline/TracingTimelineUIUtils.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  * @extends {WebInspector.TimelineUIUtils}
  */
 WebInspector.TracingTimelineUIUtils = function()
 {
@@ skipping 695 matching lines @@
     var index = events.binaryIndexOf(event.startTime, eventComparator);
     var hasChildren = false;
     var endTime = event.endTime;
     if (endTime) {
         for (var i = index; i < events.length; i++) {
             var nextEvent = events[i];
             if (nextEvent.startTime >= endTime)
                 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;
             total[category] = (total[category] || 0) + nextEvent.selfTime;
         }
     }
     return hasChildren;
 }
 
 /**
@@ skipping 76 matching lines @@
     return result;
 }
 
 /**
  * @return {!WebInspector.TracingTimelineModel.Filter}
  */
 WebInspector.TracingTimelineUIUtils.hiddenEventsFilter = function()
 {
     return new WebInspector.TracingTimelineModel.InclusiveEventNameFilter(WebInspector.TracingTimelineUIUtils._visibleTypes());
 }