DevTools: Support Top-Down tree view on Timeline

Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 1332 matching lines @@
     this.element.classList.add("timeline-details");
 
     this._defaultDetailsWidget = new WebInspector.VBox();
     this._defaultDetailsWidget.element.classList.add("timeline-details-view");
     this._defaultDetailsContentElement = this._defaultDetailsWidget.element.createChild("div", "timeline-details-view-body vbox");
     this.appendTab(WebInspector.TimelinePanel.DetailsTab.Details, WebInspector.UIString("Summary"), this._defaultDetailsWidget);
     this.setPreferredTab(WebInspector.TimelinePanel.DetailsTab.Details);
 
     if (Runtime.experiments.isEnabled("timelineTreeView")) {
         this._heavyTreeView = new WebInspector.TimelineTreeView(timelineModel);
-        this.appendTab(WebInspector.TimelinePanel.DetailsTab.BottomUpTree, WebInspector.UIString("Costly Functions"), this._heavyTreeView);
+        this.appendTab(WebInspector.TimelinePanel.DetailsTab.BottomUpTree, WebInspector.UIString("Aggregated Details"), this._heavyTreeView);
     }
 
     this._staticTabs = new Set([
         WebInspector.TimelinePanel.DetailsTab.Details,
         WebInspector.TimelinePanel.DetailsTab.BottomUpTree
     ]);
 
     this.addEventListener(WebInspector.TabbedPane.EventTypes.TabSelected, this._tabSelected, this);
 }
 
@@ skipping 430 matching lines @@
     /**
      * @override
      * @param {string} value
      */
     handleQueryParam: function(value)
     {
         WebInspector.TimelinePanel.show();
         WebInspector.TimelinePanel.instance()._loadFromURL(value);
     }
 }