Make style building for font-weight less custom.

Source/core/css/resolver/FontBuilder.h

 /*
  * 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 44 matching lines @@
 
     void setFontFamilyInitial();
     void setFontFamilyInherit(const FontDescription&);
     void setFontFamilyValue(CSSValue*);
 
     void setFontSizeInitial();
     void setFontSizeInherit(const FontDescription&);
     void setFontSizeValue(CSSValue*, RenderStyle* parentStyle, const RenderStyle* rootElementStyle);
 
     void setWeight(FontWeight);
-    void setWeightBolder();
-    void setWeightLighter();
     void setStretch(FontStretch);
 
     void setFeatureSettingsNormal();
     void setFeatureSettingsValue(CSSValue*);
 
     void setScript(const String& locale);
     void setStyle(FontStyle);
     void setVariant(FontVariant);
     void setVariantLigatures(const FontDescription::VariantLigatures&);
     void setTextRendering(TextRenderingMode);
@@ skipping 14 matching lines @@
     bool fontDirty() const { return m_fontDirty; }
 
     static FontDescription::GenericFamilyType initialGenericFamily() { return FontDescription::NoFamily; }
     static TextRenderingMode initialTextRendering() { return AutoTextRendering; }
     static FontVariant initialVariant() { return FontVariantNormal; }
     static FontDescription::VariantLigatures initialVariantLigatures() { return FontDescription::VariantLigatures(); }
     static FontStyle initialStyle() { return FontStyleNormal; }
     static FontDescription::Kerning initialKerning() { return FontDescription::AutoKerning; }
     static FontSmoothingMode initialFontSmoothing() { return AutoSmoothing; }
     static FontStretch initialStretch() { return FontStretchNormal; }
+    static FontWeight initialWeight() { return FontWeightNormal; }
 
     friend class FontDescriptionChangeScope;
 
 private:
 
     // FIXME: "size" arg should be first for consistency with other similar functions.
     void setSize(FontDescription&, float effectiveZoom, float size);
     void checkForOrientationChange(RenderStyle*);
     // This function fixes up the default font size if it detects that the current generic font family has changed. -dwh
     void checkForGenericFamilyChange(RenderStyle*, const RenderStyle* parentStyle);
@@ skipping 16 matching lines @@
     // is changed, FontBuilder tracks the need to update
     // style->font() with this bool.
     bool m_fontDirty;
 
     friend class FontBuilderTest;
 };
 
 }
 
 #endif