Have the form control element directly handle validation message updating.

Source/core/html/HTMLFormControlElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 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 15 matching lines @@
 
 #include "core/html/FormAssociatedElement.h"
 #include "core/html/LabelableElement.h"
 
 namespace WebCore {
 
 class FormDataList;
 class HTMLFieldSetElement;
 class HTMLFormElement;
 class HTMLLegendElement;
-class ValidationMessage;
+class ValidationMessageClient;
 class ValidityState;
 
 // HTMLFormControlElement is the default implementation of FormAssociatedElement,
 // and form-associated element implementations should use HTMLFormControlElement
 // unless there is a special reason.
 class HTMLFormControlElement : public LabelableElement, public FormAssociatedElement {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLFormControlElement);
 
 public:
     virtual ~HTMLFormControlElement();
@@ skipping 103 matching lines @@
 
     virtual bool isFormControlElement() const OVERRIDE FINAL { return true; }
     virtual bool alwaysCreateUserAgentShadowRoot() const OVERRIDE { return true; }
 
     virtual short tabIndex() const OVERRIDE FINAL;
 
     virtual bool isDefaultButtonForForm() const OVERRIDE FINAL;
     virtual bool isValidFormControlElement() OVERRIDE FINAL;
     void updateAncestorDisabledState() const;
 
-    OwnPtr<ValidationMessage> m_validationMessage;
+    bool isValidationMessageVisible() const;
+    ValidationMessageClient* validationMessageClient() const;
+
     bool m_disabled : 1;
     bool m_isAutofilled : 1;
     bool m_isReadOnly : 1;
     bool m_isRequired : 1;
+    bool m_hasValidationMessage : 1;
 
     enum AncestorDisabledState { AncestorDisabledStateUnknown, AncestorDisabledStateEnabled, AncestorDisabledStateDisabled };
     mutable AncestorDisabledState m_ancestorDisabledState;
     enum DataListAncestorState { Unknown, InsideDataList, NotInsideDataList };
     mutable enum DataListAncestorState m_dataListAncestorState;
 
     // The initial value of m_willValidate depends on the derived class. We can't
     // initialize it with a virtual function in the constructor. m_willValidate
     // is not deterministic as long as m_willValidateInitialized is false.
     mutable bool m_willValidateInitialized: 1;
@@ skipping 11 matching lines @@
 {
     return element.isFormControlElement();
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLFormControlElement);
 DEFINE_TYPE_CASTS(HTMLFormControlElement, FormAssociatedElement, control, control->isFormControlElement(), control.isFormControlElement());
 
 } // namespace
 
 #endif