Improve performance of HTMLSelectElement::resetToDefaultSelection().

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 196 matching lines @@
     bool isRequiredFormControl() const override;
 
     bool hasPlaceholderLabelOption() const;
 
     enum SelectOptionFlag {
         DeselectOtherOptions = 1 << 0,
         DispatchInputAndChangeEvent = 1 << 1,
         MakeOptionDirty = 1 << 2,
     };
     typedef unsigned SelectOptionFlags;
-    void selectOption(int optionIndex, SelectOptionFlags = 0);
-    void selectOption(HTMLOptionElement*, SelectOptionFlags = 0);
+    void selectOption(int optionIndex, SelectOptionFlags);
+    void selectOption(HTMLOptionElement*, SelectOptionFlags);
     void selectOption(HTMLOptionElement*, int optionIndex, SelectOptionFlags);
     void deselectItemsWithoutValidation(HTMLElement* elementToExclude = 0);
     void parseMultipleAttribute(const AtomicString&);
     HTMLOptionElement* lastSelectedOption() const;
     void updateSelectedState(HTMLOptionElement*, bool multi, bool shift);
     void menuListDefaultEventHandler(Event*);
     void handlePopupOpenKeyboardEvent(Event*);
     bool shouldOpenPopupForKeyDownEvent(KeyboardEvent*);
     bool shouldOpenPopupForKeyPressEvent(KeyboardEvent*);
     void listBoxDefaultEventHandler(Event*);
@@ skipping 53 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