Make small-caps work correctly with tr locale

Source/wtf/text/StringImpl.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller ( mueller@kde.org )
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * 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
@@ skipping 2076 matching lines @@
 }
 
 size_t StringImpl::sizeInBytes() const
 {
     size_t size = length();
     if (!is8Bit())
         size *= 2;
     return size + sizeof(*this);
 }
 
+UChar32 toUpper(UChar32 c, const AtomicString& localeIdentifier)
+{
+    if (!localeIdentifier.isNull()) {
+        if (localeIdMatchesLang(localeIdentifier, "tr") || localeIdMatchesLang(localeIdentifier, "az")) {
+            if (c == 'i')
+                return latinCapitalLetterIWithDotAbove;
+            if (c == latinSmallLetterDotlessI)
+                return 'I';
+        } else if (localeIdMatchesLang(localeIdentifier, "lt")) {
+            // TODO(rob.buis) implement upper-casing rules for lt
+            // like in StringImpl::upper(locale).
+        }
+    }
+
+    return toUpper(c);
+}
+
 } // namespace WTF