Reapply the non-MathExtras parts of

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 1269 matching lines @@
         if (prev)
             firstRootBox = prev;
     } else if (lastTextBox()) {
         ASSERT(!lastRootBox);
         firstRootBox = &lastTextBox()->root();
         firstRootBox->markDirty();
         dirtiedLines = true;
     }
     for (RootInlineBox* curr = firstRootBox; curr && curr != lastRootBox; curr = curr->nextRootBox()) {
         if (curr->lineBreakObj() == this && curr->lineBreakPos() > end)
-            curr->setLineBreakPos(clampToInteger(curr->lineBreakPos() + delta));
+            curr->setLineBreakPos(clampTo<int>(curr->lineBreakPos() + delta));
     }
 
     // If the text node is empty, dirty the line where new text will be inserted.
     if (!firstTextBox() && parent()) {
         parent()->dirtyLinesFromChangedChild(this);
         dirtiedLines = true;
     }
 
     m_linesDirty = dirtiedLines;
     setText(text, force || dirtiedLines);
@@ skipping 562 matching lines @@
     }
     secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()
 {
     return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);
 }
 
 } // namespace blink