DevTools: track more elements panel user actions

third_party/WebKit/Source/devtools/front_end/elements/ElementsTreeElement.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 305 matching lines @@
   }
 
   /**
    * @override
    * @param {boolean=} selectedByUser
    * @return {boolean}
    */
   onselect(selectedByUser) {
     this.treeOutline.suppressRevealAndSelect = true;
     this.treeOutline.selectDOMNode(this._node, selectedByUser);
-    if (selectedByUser)
+    if (selectedByUser) {
       this._node.highlight();
+      Host.userMetrics.actionTaken(Host.UserMetrics.Action.ChangeInspectedNodeInElementsPanel);

[chenwilliam, 2017/02/28 22:31:17]

This only gets triggered when you select from the elements tree outline, not
from when you use "inspect element".

+    }
     this._createSelection();
     this.treeOutline.suppressRevealAndSelect = false;
     return true;
   }
 
   /**
    * @override
    * @return {boolean}
    */
   ondelete() {
@@ skipping 1228 matching lines @@
 
 // A union of HTML4 and HTML5-Draft elements that explicitly
 // or implicitly (for HTML5) forbid the closing tag.
 Elements.ElementsTreeElement.ForbiddenClosingTagElements = new Set([
   'area', 'base',  'basefont', 'br',   'canvas',   'col',  'command', 'embed',  'frame', 'hr',
   'img',  'input', 'keygen',   'link', 'menuitem', 'meta', 'param',   'source', 'track', 'wbr'
 ]);
 
 // These tags we do not allow editing their tag name.
 Elements.ElementsTreeElement.EditTagBlacklist = new Set(['html', 'head', 'body']);