SELECT element: Improve performance of HTMLSelectElement::optionIndexToBeShown().

third_party/WebKit/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 132 matching lines @@
     LayoutUnit clientPaddingLeft() const;
     // Text starting offset in RTL.
     LayoutUnit clientPaddingRight() const;
     void valueChanged(unsigned listIndex);
     // A popup is canceled when the popup was hidden without selecting an item.
     void popupDidCancel();
     // Provisional selection is a selection made using arrow keys or type ahead.
     void provisionalSelectionChanged(unsigned);
     void popupDidHide();
     bool popupIsVisible() const { return m_popupIsVisible; }
-    int optionIndexToBeShown() const;
+    HTMLOptionElement* optionToBeShown() const;
     void showPopup();
     void hidePopup();
     PopupMenu* popup() const { return m_popup.get(); }
     void didMutateSubtree();
 
     void resetTypeAheadSessionForTesting();
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
@@ skipping 123 matching lines @@
 
     FRIEND_TEST_ALL_PREFIXES(HTMLSelectElementTest, FirstSelectableOption);
     FRIEND_TEST_ALL_PREFIXES(HTMLSelectElementTest, LastSelectableOption);
     FRIEND_TEST_ALL_PREFIXES(HTMLSelectElementTest, NextSelectableOption);
     FRIEND_TEST_ALL_PREFIXES(HTMLSelectElementTest, PreviousSelectableOption);
 };
 
 } // namespace blink
 
 #endif // HTMLSelectElement_h