Match spec for font-weight: bolder|lighter

Source/core/platform/graphics/FontDescription.cpp

 /*
  * Copyright (C) 2007 Nicholas Shanks <contact@nickshanks.com>
  * Copyright (C) 2008 Apple Inc. 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 27 matching lines @@
     float sizes[2];
     // FXIME: Make them fit into one word.
     uint32_t bitfields;
     uint32_t bitfields2 : 8;
 };
 
 COMPILE_ASSERT(sizeof(FontDescription) == sizeof(SameSizeAsFontDescription), FontDescription_should_stay_small);
 
 FontWeight FontDescription::lighterWeight(void) const
 {
-    // FIXME: Should actually return the CSS weight corresponding to next lightest
-    // weight of the currently used font family.
     switch (m_weight) {
         case FontWeight100:
         case FontWeight200:
-            return FontWeight100;
-
         case FontWeight300:
-            return FontWeight200;
-
         case FontWeight400:
         case FontWeight500:
-            return FontWeight300;
+            return FontWeight100;
 
         case FontWeight600:
         case FontWeight700:
             return FontWeight400;
 
         case FontWeight800:
-            return FontWeight500;
-
         case FontWeight900:
             return FontWeight700;
     }
     ASSERT_NOT_REACHED();
     return FontWeightNormal;
 }
 
 FontWeight FontDescription::bolderWeight(void) const
 {
-    // FIXME: Should actually return the CSS weight corresponding to next heaviest
-    // weight of the currently used font family.
     switch (m_weight) {
         case FontWeight100:
         case FontWeight200:
-            return FontWeight300;
-
         case FontWeight300:
             return FontWeight400;
 
         case FontWeight400:
         case FontWeight500:
             return FontWeight700;
 
         case FontWeight600:
         case FontWeight700:
-            return FontWeight800;
-
         case FontWeight800:
         case FontWeight900:
             return FontWeight900;
     }
     ASSERT_NOT_REACHED();
     return FontWeightNormal;
 }
 
 FontTraitsMask FontDescription::traitsMask() const
 {
     return static_cast<FontTraitsMask>((m_italic ? FontStyleItalicMask : FontStyleNormalMask)
             | (m_smallCaps ? FontVariantSmallCapsMask : FontVariantNormalMask)
             | (FontWeight100Mask << (m_weight - FontWeight100)));
     
 }
 
 FontDescription FontDescription::makeNormalFeatureSettings() const
 {
     FontDescription normalDescription(*this);
     normalDescription.setFeatureSettings(0);
     return normalDescription;
 }
 
 } // namespace WebCore