Avoid removing destination during moving paragrahs

Source/core/editing/htmlediting.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 635 matching lines @@
             n = NodeTraversal::nextSkippingChildren(n, node);
             continue;
         }
         if (n->renderer())
             return true;
         n = NodeTraversal::next(n, node);
     }
     return false;
 }
 
-Node* highestNodeToRemoveInPruning(Node* node)
+Node* highestNodeToRemoveInPruning(Node* node, Node* excludeNode)
 {
     Node* previousNode = 0;
     Node* rootEditableElement = node ? node->rootEditableElement() : 0;
     for (; node; node = node->parentNode()) {
         if (RenderObject* renderer = node->renderer()) {
-            if (!renderer->canHaveChildren() || hasARenderedDescendant(node, previousNode) || rootEditableElement == node)
+            if (!renderer->canHaveChildren() || hasARenderedDescendant(node, previousNode) || rootEditableElement == node || excludeNode == node)
                 return previousNode;
         }
         previousNode = node;
     }
     return 0;
 }
 
 Node* enclosingTableCell(const Position& p)
 {
     return toElement(enclosingNodeOfType(p, isTableCell));
@@ skipping 526 matching lines @@
     // if the selection starts just before a paragraph break, skip over it
     if (isEndOfParagraph(visiblePosition))
         return visiblePosition.next().deepEquivalent().downstream();
 
     // otherwise, make sure to be at the start of the first selected node,
     // instead of possibly at the end of the last node before the selection
     return visiblePosition.deepEquivalent().downstream();
 }
 
 } // namespace WebCore