Implement minlength for <input> and <textarea>.

Source/platform/text/PlatformLocale.h

 /*
  * 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:
  * 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 26 matching lines @@
 class PLATFORM_EXPORT Locale {
     WTF_MAKE_NONCOPYABLE(Locale);
 public:
     static PassOwnPtr<Locale> create(const String& localeIdentifier);
     static Locale& defaultLocale();
 
     String queryString(blink::WebLocalizedString::Name);
     String queryString(blink::WebLocalizedString::Name, const String& parameter);
     String queryString(blink::WebLocalizedString::Name, const String& parameter1, const String& parameter2);
     String validationMessageTooLongText(unsigned valueLength, int maxLength);
+    String validationMessageTooShortText(unsigned valueLength, int minLength);
 
     // Converts the specified number string to another number string localized
     // for this Locale locale. The input string must conform to HTML
     // floating-point numbers, and is not empty.
     String convertToLocalizedNumber(const String&);
 
     // Converts the specified localized number string to a number string in the
     // HTML floating-point number format. The input string is provided by a end
     // user, and might not be a number string. It's ok that the function returns
     // a string which is not conforms to the HTML floating-point number format,
@@ skipping 102 matching lines @@
     String m_decimalSymbols[DecimalSymbolsSize];
     String m_positivePrefix;
     String m_positiveSuffix;
     String m_negativePrefix;
     String m_negativeSuffix;
     bool m_hasLocaleData;
 };
 
 }
 #endif