Improve CSS Style matching spec compliance

Source/platform/fonts/FontDescription.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.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 224 matching lines @@
     // Given aspect value, i.e. font-size-adjust.
     float m_sizeAdjust;
 
     float m_letterSpacing;
     float m_wordSpacing;
 
     unsigned m_orientation : static_cast<unsigned>(FontOrientation::BitCount);
 
     unsigned m_widthVariant : 2; // FontWidthVariant
 
-    unsigned m_style : 1; // FontStyle
+    unsigned m_style : 2; // FontStyle
     unsigned m_variant : 1; // FontVariant
     unsigned m_isAbsoluteSize : 1; // Whether or not CSS specified an explicit size
                                   // (logical sizes like "medium" don't count).
     unsigned m_weight : 4; // FontWeight
     unsigned m_stretch : 4; // FontStretch
     unsigned m_genericFamily : 3; // GenericFamilyType
 
     unsigned m_kerning : 2; // Kerning
 
     unsigned m_commonLigaturesState : 2;
@@ skipping 47 matching lines @@
         && m_script == other.m_script
         && m_syntheticBold == other.m_syntheticBold
         && m_syntheticItalic == other.m_syntheticItalic
         && m_featureSettings == other.m_featureSettings
         && m_subpixelTextPosition == other.m_subpixelTextPosition;
 }
 
 } // namespace blink
 
 #endif