DevTools: Show JS callstacks on tracing-based timeline

Source/devtools/front_end/timeline/TracingModel.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.SDKObject}
  */
@@ skipping 314 matching lines @@
  * @param {!WebInspector.TracingModel.Event} a
  * @param {!WebInspector.TracingModel.Event} b
  * @return {number}
  */
 WebInspector.TracingModel.Event.compareStartTime = function (a, b)
 {
     return a.startTime - b.startTime;
 }
 
 /**
+ * @param {!WebInspector.TracingModel.Event} a
+ * @param {!WebInspector.TracingModel.Event} b
+ * @return {number}
+ */
+WebInspector.TracingModel.Event.orderedCompareStartTime = function (a, b)
+{
+    return a.startTime - b.startTime || -1;

[yurys, 2014/07/17 14:32:40]

Can you add a comment on why we use -1?

[alph, 2014/07/17 15:48:43]

Nuked.

+}
+
+/**
  * @constructor
  */
 WebInspector.TracingModel.NamedObject = function()
 {
 }
 
 WebInspector.TracingModel.NamedObject.prototype =
 {
     /**
      * @param {string} name
@@ skipping 206 matching lines @@
     dataCollected: function(data)
     {
         this._tracingModel._eventsCollected(data);
     },
 
     tracingComplete: function()
     {
         this._tracingModel._tracingComplete();
     }
 }