Implement invalidation tracking in devtools

Source/devtools/front_end/timeline/TimelineUIUtils.js

Index: Source/devtools/front_end/timeline/TimelineUIUtils.js
diff --git a/Source/devtools/front_end/timeline/TimelineUIUtils.js b/Source/devtools/front_end/timeline/TimelineUIUtils.js
index a341b485eaf5ce15288791c10485766765172147..2c5e17dd44ddb4264248606fdf8dfe96ee5c3b0c 100644
--- a/Source/devtools/front_end/timeline/TimelineUIUtils.js
+++ b/Source/devtools/front_end/timeline/TimelineUIUtils.js
@@ -562,8 +562,16 @@ WebInspector.TimelineDetailsContentHelper.prototype = {
 
         var rowElement = this.element.createChild("div", "timeline-details-view-row");
         rowElement.createChild("span", "timeline-details-view-row-title").textContent = WebInspector.UIString("%s: ", title);
-        var stackTraceElement = rowElement.createChild("div", "timeline-details-view-row-stack-trace monospace");
+        this.createChildStackTraceElement(rowElement, stackTrace);
+    },
 
+    /**
+     * @param {!Element} parentElement
+     * @param {!Array.<!ConsoleAgent.CallFrame>} stackTrace
+     */
+    createChildStackTraceElement: function(parentElement, stackTrace)
+    {
+        var stackTraceElement = parentElement.createChild("div", "timeline-details-view-row-stack-trace monospace");
         for (var i = 0; i < stackTrace.length; ++i) {
             var stackFrame = stackTrace[i];
             var row = stackTraceElement.createChild("div");