DevTools: measure should not destroy elements hierarchy.

third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.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:
  *
@@ skipping 1031 matching lines @@
     }
 }
 
 /**
  * @param {!Element} element
  * @param {?Element=} containerElement
  * @return {!Size}
  */
 WebInspector.measurePreferredSize = function(element, containerElement)
 {
+    var oldParent = element.parentElement;
+    var oldNextSibling = element.nextSibling;
     containerElement = containerElement || element.ownerDocument.body;
     containerElement.appendChild(element);
     element.positionAt(0, 0);
     var result = new Size(element.offsetWidth, element.offsetHeight);
+
     element.positionAt(undefined, undefined);
-    element.remove();
+    if (oldParent)
+        oldParent.insertBefore(element, oldNextSibling);
+    else
+        element.remove();
     return result;
 }
 
 /**
  * @constructor
  * @param {boolean} autoInvoke
  */
 WebInspector.InvokeOnceHandlers = function(autoInvoke)
 {
     this._handlers = null;
@@ skipping 925 matching lines @@
  * @param {string} title
  * @return {!Element}
  */
 WebInspector.linkifyDocumentationURLAsNode = function(article, title)
 {
     return WebInspector.linkifyURLAsNode("https://developers.google.com/web/tools/chrome-devtools/" + article, title, undefined, true);
 }
 
 /** @type {!WebInspector.ThemeSupport} */
 WebInspector.themeSupport;