Reapply the patch r191685 with fixing the regression issue.

Source/core/html/HTMLTextAreaElement.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) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 621 matching lines @@
 {
     return true;
 }
 
 const AtomicString& HTMLTextAreaElement::defaultAutocapitalize() const
 {
     DEFINE_STATIC_LOCAL(const AtomicString, sentences, ("sentences", AtomicString::ConstructFromLiteral));
     return sentences;
 }
 
+void HTMLTextAreaElement::copyNonAttributePropertiesFromElement(const Element& source)
+{
+    const HTMLTextAreaElement& sourceElement = static_cast<const HTMLTextAreaElement&>(source);
+    setValueCommon(sourceElement.value(), DispatchNoEvent, SetSeletion);
+    m_isDirty = sourceElement.m_isDirty;
+    HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(source);
+}
+
 } // namespace blink