about:tracing support for TRACE_ASYNC_START/FINISH events.

chrome/browser/resources/tracing/timeline.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview Interactive visualizaiton of TimelineModel objects
  * based loosely on gantt charts. Each thread in the TimelineModel is given a
  * set of TimelineTracks, one per subrow in the thread. The Timeline class
  * acts as a controller, creating the individual tracks, while TimelineTracks
  * do actual drawing.
@@ skipping 378 matching lines @@
         // Get a sorted list of threads.
         var threads = [];
         for (var tid in process.threads)
           threads.push(process.threads[tid]);
         threads.sort(tracing.TimelineThread.compare);
 
         // Create the threads.
         threads.forEach(function(thread) {
           var track = new tracing.TimelineThreadTrack();
           track.heading = thread.userFriendlyName + ':';
-          track.tooltip = thread.userFriendlyDetials;
+          track.tooltip = thread.userFriendlyDetails;
           track.headingWidth = maxHeadingWidth;
           track.viewport = this.viewport_;
           track.thread = thread;
           this.tracks_.appendChild(track);
         }.bind(this));
       }.bind(this));
 
       // Set up a reasonable viewport.
       this.viewport_.setWhenPossible(function() {
         var rangeTimestamp = this.model_.maxTimestamp -
@@ skipping 345 matching lines @@
    * The TimelineModel being viewed by the timeline
    * @type {TimelineModel}
    */
   cr.defineProperty(Timeline, 'model', cr.PropertyKind.JS);
 
   return {
     Timeline: Timeline,
     TimelineViewport: TimelineViewport
   };
 });