Merge 116357

Source/WebCore/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 616 matching lines @@
         // Someone may have indirectly caused a <q> to split.  When this happens, the :after content
         // has to move into the inline continuation.  Call updateBeforeAfterContent to ensure that the inline's :after
         // content gets properly destroyed.
         bool isLastChild = (currChildNextSibling == blockCurr->lastChild());
         if (document()->usesBeforeAfterRules())
             blockCurr->children()->updateBeforeAfterContent(blockCurr, AFTER);
         if (isLastChild && currChildNextSibling != blockCurr->lastChild())
             currChildNextSibling = 0; // We destroyed the last child, so now we need to update
                                       // the value of currChildNextSibling.
 
+        // It is possible that positioned objects under blockCurr are going to be moved to cloneBlock.
+        // Since we are doing layout anyway, it is easier to blow away the entire list, than
+        // traversing down the subtree looking for positioned children and then remove them
+        // from our positioned objects list.
+        if (currChildNextSibling)
+            blockCurr->removePositionedObjects(0);
+
         // Now we need to take all of the children starting from the first child
         // *after* currChild and append them all to the clone.
         blockCurr->moveChildrenTo(cloneBlock, currChildNextSibling, 0, true);
 
         // Keep walking up the chain.
         currChild = curr;
         currChildNextSibling = currChild->nextSibling();
         curr = toRenderBoxModelObject(curr->parent());
     }
 
@@ skipping 6646 matching lines @@
 }
 
 String ValueToString<RenderBlock::FloatingObject*>::string(const RenderBlock::FloatingObject* floatingObject)
 {
     return String::format("%p (%dx%d %dx%d)", floatingObject, floatingObject->pixelSnappedX(), floatingObject->pixelSnappedY(), floatingObject->pixelSnappedMaxX(), floatingObject->pixelSnappedMaxY());
 }
 
 #endif
 
 } // namespace WebCore