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 55 matching lines @@
     this.element = shadowContainer;
 
     this._includeRootDOMNode = !omitRootDOMNode;
     this._selectEnabled = selectEnabled;
     /** @type {?SDK.DOMNode} */
     this._rootDOMNode = null;
     /** @type {?SDK.DOMNode} */
     this._selectedDOMNode = null;
 
     this._visible = false;
+    this._reportedNodeSelectedUMA = false;
 
     this._popoverHelper = new UI.PopoverHelper(this._element);
     this._popoverHelper.initializeCallbacks(this._getPopoverAnchor.bind(this), this._showPopover.bind(this));
     this._popoverHelper.setTimeout(0, 100);
 
     /** @type {!Map<!SDK.DOMNode, !Elements.ElementsTreeOutline.UpdateRecord>} */
     this._updateRecords = new Map();
     /** @type {!Set<!Elements.ElementsTreeElement>} */
     this._treeElementsBeingUpdated = new Set();
 
@@ skipping 300 matching lines @@
     }
 
     if (selectedNode)
       this._revealAndSelectNode(selectedNode, true);
   }
 
   /**
    * @param {boolean} focus
    */
   _selectedNodeChanged(focus) {
+    if (this._reportedNodeSelectedUMA)

[pfeldman, 2017/02/10 23:00:46]

!this._reportedNodeSelectedUMA

[chenwilliam, 2017/02/25 00:49:14]

I want to report it on the second time and afterwards, not the first time,
because the first time might be people using Inspect to open DevTools.

+      Host.userMetrics.actionTaken(Host.UserMetrics.Action.ElementsTreeOutlineSelectNode);
+    this._reportedNodeSelectedUMA = true;
     this.dispatchEventToListeners(
         Elements.ElementsTreeOutline.Events.SelectedNodeChanged, {node: this._selectedDOMNode, focus: focus});
   }
 
   /**
    * @param {!Array.<!SDK.DOMNode>} nodes
    */
   _fireElementsTreeUpdated(nodes) {
     this.dispatchEventToListeners(Elements.ElementsTreeOutline.Events.ElementsTreeUpdated, nodes);
   }
@@ skipping 1282 matching lines @@
      */
     function resolved(node) {
       if (node) {
         this.treeOutline._selectedDOMNode = node;
         this.treeOutline._selectedNodeChanged();
       }
     }
     return true;
   }
 };