[oilpan] Completely move HTMLFormControlElement's hierarchy to the managed heap

Source/core/html/HTMLSelectElement.h

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * 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, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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
@@ skipping 20 matching lines @@
 #include "core/html/HTMLOptionsCollection.h"
 #include "core/html/TypeAhead.h"
 #include <wtf/Vector.h>
 
 namespace WebCore {
 
 class HTMLOptionElement;
 
 class HTMLSelectElement : public HTMLFormControlElementWithState, public TypeAheadDataSource {
 public:
-    static PassRefPtr<HTMLSelectElement> create(const QualifiedName&, Document*, HTMLFormElement*);
+    static Result<HTMLSelectElement> create(const QualifiedName&, Document*, HTMLFormElement*);
 
     int selectedIndex() const;
     void setSelectedIndex(int);
 
     void optionSelectedByUser(int index, bool dispatchChangeEvent, bool allowMultipleSelection = false);
 
     // For ValidityState
     virtual String validationMessage() const OVERRIDE;
     virtual bool valueMissing() const OVERRIDE;
 
@@ skipping 46 matching lines @@
     int optionToListIndex(int optionIndex) const;
     int activeSelectionStartListIndex() const;
     int activeSelectionEndListIndex() const;
     void setActiveSelectionAnchorIndex(int);
     void setActiveSelectionEndIndex(int);
     void updateListBoxSelection(bool deselectOtherOptions);
     
     // For use in the implementation of HTMLOptionElement.
     void optionSelectionStateChanged(HTMLOptionElement*, bool optionIsSelected);
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 protected:
     HTMLSelectElement(const QualifiedName&, Document*, HTMLFormElement*);
 
 private:
     virtual const AtomicString& formControlType() const;
     
     virtual bool isKeyboardFocusable(KeyboardEvent*) const;
     virtual bool isMouseFocusable() const;
 
     virtual void dispatchFocusEvent(PassRefPtr<Node> oldFocusedNode, FocusDirection) OVERRIDE;
@@ skipping 82 matching lines @@
     bool m_multiple;
     bool m_activeSelectionState;
     mutable bool m_shouldRecalcListItems;
 };
 
 inline bool isHTMLSelectElement(const Node* node)
 {
     return node->hasTagName(HTMLNames::selectTag);
 }
 
-inline HTMLSelectElement* toHTMLSelectElement(Node* node)
+inline Result<HTMLSelectElement> toHTMLSelectElement(Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLSelectElement(node));
-    return static_cast<HTMLSelectElement*>(node);
+    return Handle<HTMLSelectElement>(static_cast<HTMLSelectElement*>(node));
 }
 
-inline const HTMLSelectElement* toHTMLSelectElement(const Node* node)
+inline Result<const HTMLSelectElement> toHTMLSelectElement(const Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLSelectElement(node));
-    return static_cast<const HTMLSelectElement*>(node);
+    return Handle<const HTMLSelectElement>(static_cast<const HTMLSelectElement*>(node));
 }
 
 void toHTMLSelectElement(const HTMLSelectElement*); // This overload will catch anyone doing an unnecessary cast.
 
 } // namespace
 
 #endif