Introduce a struct to store arguments of Element::focus().

third_party/WebKit/Source/core/html/HTMLAreaElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2009, 2011 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 204 matching lines @@
     if (!imageElement)
         return;
 
     LayoutObject* layoutObject = imageElement->layoutObject();
     if (!layoutObject || !layoutObject->isImage())
         return;
 
     toLayoutImage(layoutObject)->areaElementFocusChanged(this);
 }
 
-void HTMLAreaElement::updateFocusAppearance(bool restorePreviousSelection)
+void HTMLAreaElement::updateFocusAppearance(SelectionBehaviorOnFocus selectionBehavior)
 {
     if (!isFocusable())
         return;
 
-    HTMLImageElement* imageElement = this->imageElement();
-    if (!imageElement)
-        return;
-
-    imageElement->updateFocusAppearance(restorePreviousSelection);
+    if (HTMLImageElement* imageElement = this->imageElement())
+        imageElement->updateFocusAppearance(selectionBehavior);
 }
 
 }