First past at removing writing mode.

sky/engine/core/css/resolver/FontBuilder.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google 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.
  *
@@ skipping 439 matching lines @@
     switch (style->textOrientation()) {
     case TextOrientationVerticalRight:
         fontOrientation = Vertical;
         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
         return;
     case TextOrientationUpright:
         fontOrientation = Vertical;
         glyphOrientation = NonCJKGlyphOrientationUpright;
         return;
     case TextOrientationSideways:
-        if (style->writingMode() == LeftToRightWritingMode) {
-            // FIXME: This should map to sideways-left, which is not supported yet.
-            fontOrientation = Vertical;
-            glyphOrientation = NonCJKGlyphOrientationVerticalRight;
-            return;
-        }
         fontOrientation = Horizontal;
         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
         return;
     case TextOrientationSidewaysRight:
         fontOrientation = Horizontal;
         glyphOrientation = NonCJKGlyphOrientationVerticalRight;
         return;
     default:
         ASSERT_NOT_REACHED();
         fontOrientation = Horizontal;
@@ skipping 88 matching lines @@
     FontOrientation fontOrientation;
     NonCJKGlyphOrientation glyphOrientation;
     getFontAndGlyphOrientation(documentStyle, fontOrientation, glyphOrientation);
     fontDescription.setOrientation(fontOrientation);
     fontDescription.setNonCJKGlyphOrientation(glyphOrientation);
     documentStyle->setFontDescription(fontDescription);
     documentStyle->font().update(fontSelector);
 }
 
 }