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diff --git a/Source/WebCore/html/ValidityState.h b/Source/WebCore/html/ValidityState.h
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+/*
+ * 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.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef ValidityState_h
+#define ValidityState_h
+
+#include "FormAssociatedElement.h"
+#include <wtf/PassOwnPtr.h>
+
+namespace WebCore {
+
+class ValidityState {
+    WTF_MAKE_NONCOPYABLE(ValidityState); WTF_MAKE_FAST_ALLOCATED;
+public:
+    static PassOwnPtr<ValidityState> create(FormAssociatedElement* control)
+    {
+        return adoptPtr(new ValidityState(control));
+    }
+
+    void ref() { m_control->ref(); }
+    void deref() { m_control->deref(); }
+
+    String validationMessage() const;
+
+    void setCustomErrorMessage(const String&);
+
+    bool valueMissing() const;
+    bool typeMismatch() const;
+    bool patternMismatch() const;
+    bool tooLong() const;
+    bool rangeUnderflow() const;
+    bool rangeOverflow() const;
+    bool stepMismatch() const;
+    bool customError() const;
+    bool valid() const;
+
+private:
+    ValidityState(FormAssociatedElement* control) : m_control(control) { }
+
+    static bool isValidColorString(const String&);
+    static bool isValidEmailAddress(const String&);
+
+    FormAssociatedElement* m_control;
+    String m_customErrorMessage;
+};
+
+} // namespace WebCore
+
+#endif // ValidityState_h