First pass at removing dead vertical writing mode code.

sky/engine/core/rendering/line/LineWidth.cpp

 /*
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 84 matching lines @@
     for (LayoutUnit lineBottom = lineTop; lineBottom <= lineTop + lineHeight; lineBottom++) {
         LayoutUnit availableWidthAtBottom = availableWidthAtOffset(block, lineBottom, shouldIndentText);
         if (availableWidthAtBottom < uncommittedWidth)
             return false;
     }
     return true;
 }
 
 void LineWidth::wrapNextToShapeOutside(bool isFirstLine)
 {
-    LayoutUnit lineHeight = m_block.lineHeight(isFirstLine, m_block.isHorizontalWritingMode() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes);
+    LayoutUnit lineHeight = m_block.lineHeight(isFirstLine, HorizontalLine, PositionOfInteriorLineBoxes);
     LayoutUnit lineLogicalTop = m_block.logicalHeight();
     LayoutUnit newLineTop = lineLogicalTop;
     LayoutUnit floatLogicalBottom = lineLogicalTop;
 
     float newLineWidth;
     float newLineLeft = m_left;
     float newLineRight = m_right;
     while (true) {
         newLineWidth = availableWidthAtOffset(m_block, newLineTop, shouldIndentText(), newLineLeft, newLineRight);
         if (newLineWidth >= m_uncommittedWidth && isWholeLineFit(m_block, newLineTop, lineHeight, m_uncommittedWidth, shouldIndentText()))
@@ skipping 31 matching lines @@
     }
     updateLineDimension(lastFloatLogicalBottom, newLineWidth, newLineLeft, newLineRight);
 }
 
 void LineWidth::computeAvailableWidthFromLeftAndRight()
 {
     m_availableWidth = max(0.0f, m_right - m_left);
 }
 
 }