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

Source/core/rendering/InlineFlowBox.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 710 matching lines @@
             }
             lineBottom = max<LayoutUnit>(lineBottom, pixelSnappedLogicalBottom());
             lineBottomIncludingMargins = max(lineBottom, lineBottomIncludingMargins);
         }
 
         if (renderer()->style()->isFlippedLinesWritingMode())
             flipLinesInBlockDirection(lineTopIncludingMargins, lineBottomIncludingMargins);
     }
 }
 
-#if ENABLE(CSS3_TEXT)
 void InlineFlowBox::computeMaxLogicalTop(float& maxLogicalTop) const
 {
     for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) {
         if (curr->renderer()->isOutOfFlowPositioned())
             continue; // Positioned placeholders don't affect calculations.
 
         if (descendantsHaveSameLineHeightAndBaseline())
             continue;
 
         maxLogicalTop = max<float>(maxLogicalTop, curr->y());
         float localMaxLogicalTop = 0;
         if (curr->isInlineFlowBox())
             toInlineFlowBox(curr)->computeMaxLogicalTop(localMaxLogicalTop);
         maxLogicalTop = max<float>(maxLogicalTop, localMaxLogicalTop);
     }
 }
-#endif // CSS3_TEXT
 
 void InlineFlowBox::flipLinesInBlockDirection(LayoutUnit lineTop, LayoutUnit lineBottom)
 {
     // Flip the box on the line such that the top is now relative to the lineBottom instead of the lineTop.
     setLogicalTop(lineBottom - (logicalTop() - lineTop) - logicalHeight());
 
     for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) {
         if (curr->renderer()->isOutOfFlowPositioned())
             continue; // Positioned placeholders aren't affected here.
 
@@ skipping 877 matching lines @@
         ASSERT(child->prevOnLine() == prev);
         prev = child;
     }
     ASSERT(prev == m_lastChild);
 #endif
 }
 
 #endif
 
 } // namespace WebCore