Merge 143437

Source/WebCore/inspector/front-end/View.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 29 matching lines @@
     this._cssFiles = [];
     this._notificationDepth = 0;
 }
 
 WebInspector.View._cssFileToVisibleViewCount = {};
 WebInspector.View._cssFileToStyleElement = {};
 
 WebInspector.View.prototype = {
     markAsRoot: function()
     {
+        WebInspector.View._assert(!this.element.parentElement, "Attempt to mark as root attached node");
         this._isRoot = true;
     },
 
     isShowing: function()
     {
         return this._isShowing;
     },
 
     setHideOnDetach: function()
     {
@@ skipping 407 matching lines @@
 {
     WebInspector.View._assert(!child.__viewCounter && !child.__view, "Attempt to remove element containing view via regular DOM operation");
     return WebInspector.View._originalRemoveChild.call(this, child);
 }
 
 Element.prototype.removeChildren = function()
 {
     WebInspector.View._assert(!this.__viewCounter, "Attempt to remove element containing view via regular DOM operation");
     WebInspector.View._originalRemoveChildren.call(this);
 }