Improve CSS Style matching spec compliance

Source/core/css/CSSPrimitiveValueMappings.h

Index: Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/Source/core/css/CSSPrimitiveValueMappings.h b/Source/core/css/CSSPrimitiveValueMappings.h
index a8976b8fa00767dfd00e6421e09dc35c1b8ec5d4..810dd846bf19f9cc2a57ec97dad9d1a032b14c7c 100644
--- a/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/Source/core/css/CSSPrimitiveValueMappings.h
@@ -3233,6 +3233,9 @@ template<> inline CSSPrimitiveValue::CSSPrimitiveValue(FontStyle italic)
     case FontStyleNormal:
         m_value.valueID = CSSValueNormal;
         return;
+    case FontStyleOblique:
+        m_value.valueID = CSSValueOblique;
+        return;
     case FontStyleItalic:
         m_value.valueID = CSSValueItalic;
         return;
@@ -3247,7 +3250,7 @@ template<> inline CSSPrimitiveValue::operator FontStyle() const
     ASSERT(isValueID());
     switch (m_value.valueID) {
     case CSSValueOblique:
-    // FIXME: oblique is the same as italic for the moment...
+        return FontStyleOblique;
     case CSSValueItalic:
         return FontStyleItalic;
     case CSSValueNormal: