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

Source/core/rendering/RenderText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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 1431 matching lines @@
     return textBox;
 }
 
 void RenderText::positionLineBox(InlineBox* box)
 {
     InlineTextBox* s = toInlineTextBox(box);
 
     // FIXME: should not be needed!!!
     if (!s->len()) {
         // We want the box to be destroyed.
-        s->remove();
+        s->remove(DontMarkLineBoxes);
         if (m_firstTextBox == s)
             m_firstTextBox = s->nextTextBox();
         else
             s->prevTextBox()->setNextTextBox(s->nextTextBox());
         if (m_lastTextBox == s)
             m_lastTextBox = s->prevTextBox();
         else
             s->nextTextBox()->setPreviousTextBox(s->prevTextBox());
         s->destroy();
         return;
@@ skipping 400 matching lines @@
     }
     secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()
 {
     return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);
 }
 
 } // namespace WebCore