Speed up case folding for 8-bit strings

Source/wtf/text/StringImplTest.cpp

 /*
  * Copyright (C) 2012 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
 #include <gtest/gtest.h>
 
 namespace {
 
 TEST(WTF, StringImplCreate8Bit)
 {
     RefPtr<StringImpl> testStringImpl = StringImpl::create("1224");
     ASSERT_TRUE(testStringImpl->is8Bit());
 }
 
+TEST(WTF, StringImplLatin1CaseFoldTable)
+{
+    LChar symbol = 0xff;
+    while (symbol--) {
+        EXPECT_EQ(WTF::Unicode::foldCase(symbol), StringImpl::latin1CaseFoldTable[symbol]);
+    }
+}
+
+
 } // namespace