DevTools: track more elements panel user actions

third_party/WebKit/Source/devtools/front_end/elements/ElementsTreeOutline.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 575 matching lines @@
      */
     function showPopover(contents) {
       if (!contents)
         return;
       popover.setCanShrink(false);
       popover.showForAnchor(contents, link);
     }
   }
 
   _onmousedown(event) {
+    Host.userMetrics.actionTaken(Host.UserMetrics.Action.ElementsTreeOutlineClick);

[pfeldman, 2017/02/07 19:15:27]

That's going to be comparable to the style edit.

     var element = this._treeElementFromEvent(event);
 
     if (!element || element.isEventWithinDisclosureTriangle(event))
       return;
 
     element.select();
   }
 
   /**
    * @param {?UI.TreeElement} treeElement
@@ skipping 1082 matching lines @@
      */
     function resolved(node) {
       if (node) {
         this.treeOutline._selectedDOMNode = node;
         this.treeOutline._selectedNodeChanged();
       }
     }
     return true;
   }
 };