Remove frame disconnection counter updating in removeDetachedChildren()

Source/core/dom/ContainerNode.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 56 matching lines @@
             oldParent->removeChild(&node, exceptionState);
         return;
     }
     getChildNodes(node, nodes);
     toContainerNode(node).removeChildren();
 }
 
 #if !ENABLE(OILPAN)
 void ContainerNode::removeDetachedChildren()
 {
-    if (connectedSubframeCount()) {
-        for (Node* child = firstChild(); child; child = child->nextSibling())
-            child->updateAncestorConnectedSubframeCountForRemoval();
-    }
+    ASSERT(!connectedSubframeCount());
     ASSERT(needsAttach());
     removeDetachedChildrenInContainer<Node, ContainerNode>(*this);
 }
 #endif
 
 void ContainerNode::parserTakeAllChildrenFrom(ContainerNode& oldParent)
 {
     while (RefPtr<Node> child = oldParent.firstChild()) {
         oldParent.parserRemoveChild(*child);
         treeScope().adoptIfNeeded(*child);
@@ skipping 1125 matching lines @@
         return true;
 
     if (node->isElementNode() && toElement(node)->shadow())
         return true;
 
     return false;
 }
 #endif
 
 } // namespace WebCore