Replace compile flag with runtime check for text-underline-position

Source/core/rendering/RootInlineBox.cpp

 /*
  * Copyright (C) 2003, 2006, 2008 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 272 matching lines @@
 
     LayoutUnit gridSnapAdjustment = lineSnapAdjustment();
     if (gridSnapAdjustment) {
         adjustBlockDirectionPosition(gridSnapAdjustment);
         heightOfBlock += gridSnapAdjustment;
     }
 
     return heightOfBlock + maxHeight;
 }
 
-#if ENABLE(CSS3_TEXT)
 float RootInlineBox::maxLogicalTop() const
 {
     float maxLogicalTop = 0;
     computeMaxLogicalTop(maxLogicalTop);
     return maxLogicalTop;
 }
-#endif // CSS3_TEXT
 
 LayoutUnit RootInlineBox::beforeAnnotationsAdjustment() const
 {
     LayoutUnit result = 0;
 
     if (!renderer()->style()->isFlippedLinesWritingMode()) {
         // Annotations under the previous line may push us down.
         if (prevRootBox() && prevRootBox()->hasAnnotationsAfter())
             result = prevRootBox()->computeUnderAnnotationAdjustment(lineTop());
 
@@ skipping 673 matching lines @@
 }
 
 #ifndef NDEBUG
 const char* RootInlineBox::boxName() const
 {
     return "RootInlineBox";
 }
 #endif
 
 } // namespace WebCore