// want to do any conversion for non-ASCII letters.
WTF_EXPORT_STRING_API String convertToASCIILowercase() const;
WTF_EXPORT_STRING_API String lower() const;
+ WTF_EXPORT_STRING_API String convertToASCIIUppercase() const;
WTF_EXPORT_STRING_API String upper() const;
WTF_EXPORT_STRING_API String lower(const AtomicString& localeIdentifier) const;