Explicitly compare FontVariant to enumerators.

Source/platform/fonts/Font.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2010, 2011 Apple 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 378 matching lines @@
         }
     }
     return make_pair(data, page);
 }
 
 std::pair<GlyphData, GlyphPage*> Font::glyphDataAndPageForCharacter(UChar32 c, bool mirror, FontDataVariant variant) const
 {
     ASSERT(isMainThread());
 
     if (variant == AutoVariant) {
-        if (m_fontDescription.variant() && !primaryFont()->isSVGFont()) {
+        if (m_fontDescription.variant() == FontVariantSmallCaps && !primaryFont()->isSVGFont()) {
             UChar32 upperC = toUpper(c);
             if (upperC != c) {
                 c = upperC;
                 variant = SmallCapsVariant;
             } else {
                 variant = NormalVariant;
             }
         } else {
             variant = NormalVariant;
         }
@@ skipping 441 matching lines @@
                 if (delta <= 0)
                     break;
             }
         }
     }
 
     return offset;
 }
 
 }