Avoid markDirty when removing out-of-flow line boxes.

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 1922 matching lines @@
             // Our object was a block originally, so we make our normal flow position be
             // just below the line box (as though all the inlines that came before us got
             // wrapped in an anonymous block, which is what would have happened had we been
             // in flow).  This value was cached in the y() of the box.
             layer()->setStaticBlockPosition(box->logicalTop());
             if (style()->hasStaticBlockPosition(box->isHorizontal()))
                 setChildNeedsLayout(MarkOnlyThis); // Just go ahead and mark the positioned object as needing layout, so it will update its position properly.
         }
 
         // Nuke the box.
-        box->remove();
+        box->remove(DontMarkLineBoxes);
         box->destroy();
     } else if (isReplaced()) {
         setLocation(roundedLayoutPoint(box->topLeft()));
         setInlineBoxWrapper(box);
     }
 }
 
 void RenderBox::deleteLineBoxWrapper()
 {
     if (inlineBoxWrapper()) {
@@ skipping 2701 matching lines @@
         return 0;
 
     if (!layoutState && !flowThreadContainingBlock())
         return 0;
 
     RenderBlock* containerBlock = containingBlock();
     return containerBlock->offsetFromLogicalTopOfFirstPage() + logicalTop();
 }
 
 } // namespace WebCore