Remove some dead code from rendering/ folder

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 446 matching lines @@
             }
             quads.append(localToAbsoluteQuad(r, 0, wasFixed));
         } else {
             FloatRect rect = localQuadForTextBox(box, start, end, useSelectionHeight);
             if (!rect.isZero())
                 quads.append(localToAbsoluteQuad(rect, 0, wasFixed));
         }
     }
 }
 
-InlineTextBox* RenderText::findNextInlineTextBox(int offset, int& pos) const
-{
-    // The text runs point to parts of the RenderText's m_text
-    // (they don't include '\n')
-    // Find the text run that includes the character at offset
-    // and return pos, which is the position of the char in the run.
-
-    if (!m_firstTextBox)
-        return 0;
-
-    InlineTextBox* s = m_firstTextBox;
-    int off = s->len();
-    while (offset > off && s->nextTextBox()) {
-        s = s->nextTextBox();
-        off = s->start() + s->len();
-    }
-    // we are now in the correct text run
-    pos = (offset > off ? s->len() : s->len() - (off - offset) );
-    return s;
-}
-
 enum ShouldAffinityBeDownstream { AlwaysDownstream, AlwaysUpstream, UpstreamIfPositionIsNotAtStart };
 
 static bool lineDirectionPointFitsInBox(int pointLineDirection, InlineTextBox* box, ShouldAffinityBeDownstream& shouldAffinityBeDownstream)
 {
     shouldAffinityBeDownstream = AlwaysDownstream;
 
     // the x coordinate is equal to the left edge of this box
     // the affinity must be downstream so the position doesn't jump back to the previous line
     // except when box is the first box in the line
     if (pointLineDirection <= box->logicalLeft()) {
@@ skipping 1386 matching lines @@
     }
     secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()
 {
     return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);
 }
 
 } // namespace WebCore