Implement minlength for <input> and <textarea>.

Source/core/html/ValidityState.cpp

 /*
  * This file is part of the WebKit project.
  *
  * Copyright (C) 2009 Michelangelo De Simone <micdesim@gmail.com>
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 33 matching lines @@
 bool ValidityState::patternMismatch() const
 {
     return m_control->patternMismatch();
 }
 
 bool ValidityState::tooLong() const
 {
     return m_control->tooLong();
 }
 
+bool ValidityState::tooShort() const
+{
+    return m_control->tooShort();
+}
+
 bool ValidityState::rangeUnderflow() const
 {
     return m_control->rangeUnderflow();
 }
 
 bool ValidityState::rangeOverflow() const
 {
     return m_control->rangeOverflow();
 }
 
@@ skipping 11 matching lines @@
 {
     return m_control->customError();
 }
 
 bool ValidityState::valid() const
 {
     return m_control->valid();
 }
 
 } // namespace