StringImpl should not be referred from StringImplCF.

Source/platform/text/LocaleMac.mm

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 70 matching lines @@
 }
 
 LocaleMac::LocaleMac(NSLocale* locale)
     : m_locale(locale)
     , m_gregorianCalendar(AdoptNS, [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar])
     , m_didInitializeNumberData(false)
 {
     NSArray* availableLanguages = [NSLocale ISOLanguageCodes];
     // NSLocale returns a lower case NSLocaleLanguageCode so we don't have care about case.
     NSString* language = [m_locale.get() objectForKey:NSLocaleLanguageCode];
-    if ([availableLanguages indexOfObject:language] == NSNotFound)
-        m_locale.adoptNS([[NSLocale alloc] initWithLocaleIdentifier:defaultLanguage()]);
+    if ([availableLanguages indexOfObject:language] == NSNotFound) {
+        NSString *nsLanguage = [[NSString alloc] initWithUTF8String:defaultLanguage().utf8().data()];
+        m_locale.adoptNS([[NSLocale alloc] initWithLocaleIdentifier:nsLanguage]);
+        [nsLanguage release];
+    }
     [m_gregorianCalendar.get() setLocale:m_locale.get()];
 }
 
 LocaleMac::~LocaleMac()
 {
 }
 
 PassOwnPtr<LocaleMac> LocaleMac::create(const String& localeIdentifier)
 {
     RetainPtr<NSLocale> locale = [[NSLocale alloc] initWithLocaleIdentifier:localeIdentifier];
@@ skipping 217 matching lines @@
     ASSERT(symbols.size() == DecimalSymbolsSize);
 
     String positivePrefix([formatter.get() positivePrefix]);
     String positiveSuffix([formatter.get() positiveSuffix]);
     String negativePrefix([formatter.get() negativePrefix]);
     String negativeSuffix([formatter.get() negativeSuffix]);
     setLocaleData(symbols, positivePrefix, positiveSuffix, negativePrefix, negativeSuffix);
 }
 
 }