DevTools: [regression] console layout is broken for dom nodes.

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 22 matching lines @@
  * @extends {TreeElement}
  * @param {!WebInspector.DOMNode} node
  * @param {boolean=} elementCloseTag
  */
 WebInspector.ElementsTreeElement = function(node, elementCloseTag)
 {
     // The title will be updated in onattach.
     TreeElement.call(this);
     this._node = node;
 
-    this._decorationsElement = createElementWithClass("div");
+    this._decorationsElement = createElementWithClass("div", "hidden");
     this.listItemElement.appendChild(this._decorationsElement);
 
     this._elementCloseTag = elementCloseTag;
 
     if (this._node.nodeType() == Node.ELEMENT_NODE && !elementCloseTag)
         this._canAddAttributes = true;
     this._searchQuery = null;
     this._expandedChildrenLimit = WebInspector.ElementsTreeElement.InitialChildrenLimit;
     if (this._node.nodeType() === Node.ELEMENT_NODE && this._node.parentNode && this._node.parentNode.nodeType() === Node.DOCUMENT_NODE && !this._node.parentNode.parentNode)
         this.setCollapsible(false);
@@ skipping 1067 matching lines @@
         }
 
         Promise.all(promises).then(setTitle.bind(this));
 
         /**
          * @this {WebInspector.ElementsTreeElement}
          */
         function setTitle()
         {
             this._decorationsElement.removeChildren();
+            this._decorationsElement.classList.add("hidden");
             if (!decorations.length && !descendantDecorations.length)
                 return;
 
             var colors = new Set();
             var titles = [];
 
             for (var decoration of decorations) {
                 titles.push(decoration.title);
                 colors.add(decoration.color);
             }
@@ skipping 17 matching lines @@
 
             /**
              * @param {!Set<string>} colors
              * @param {string} className
              * @this {WebInspector.ElementsTreeElement}
              */
             function processColors(colors, className)
             {
                 for (var color of colors) {
                     var child = this._decorationsElement.createChild("div", className);
+                    this._decorationsElement.classList.remove("hidden");
                     child.style.backgroundColor = color;
                     child.style.borderColor = color;
                     if (offset)
                         child.style.marginLeft = offset + "px";
                     offset += 3;
                 }
             }
         }
     },
 
@@ skipping 402 matching lines @@
 
             if (object)
                 object.callFunction(scrollIntoView);
         }
 
         this._node.resolveToObject("", scrollIntoViewCallback);
     },
 
     __proto__: TreeElement.prototype
 }