DevTools: Show JS callstacks on tracing-based timeline

Source/devtools/front_end/timeline/TracingModel.js

Index: Source/devtools/front_end/timeline/TracingModel.js
diff --git a/Source/devtools/front_end/timeline/TracingModel.js b/Source/devtools/front_end/timeline/TracingModel.js
index 0261d4ab0f0950f818222deade090011bc08ab06..1775d3359c4839b642ed43de4945e15e5ee6a577 100644
--- a/Source/devtools/front_end/timeline/TracingModel.js
+++ b/Source/devtools/front_end/timeline/TracingModel.js
@@ -332,6 +332,16 @@ WebInspector.TracingModel.Event.compareStartTime = function (a, b)
 }
 
 /**
+ * @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()