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

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 223 matching lines @@
 {
     // If a given text area can be focused at all, then it will always be keyboard focusable.
     return isFocusable();
 }
 
 bool HTMLTextAreaElement::shouldShowFocusRingOnMouseFocus() const
 {
     return true;
 }
 
-void HTMLTextAreaElement::updateFocusAppearance(bool restorePreviousSelection)
+void HTMLTextAreaElement::updateFocusAppearance(SelectionBehaviorOnFocus selectionBehavior)
 {
-    if (!restorePreviousSelection)
+    switch (selectionBehavior) {
+    case SelectionBehaviorOnFocus::Reset:
         setSelectionRange(0, 0, SelectionHasNoDirection, NotDispatchSelectEvent);
-    else
+        break;
+    case SelectionBehaviorOnFocus::Restore:
         restoreCachedSelection();
-
+        break;
+    }
     if (document().frame())
         document().frame()->selection().revealSelection();
 }
 
 void HTMLTextAreaElement::defaultEventHandler(Event* event)
 {
     if (layoutObject() && (event->isMouseEvent() || event->isDragEvent() || event->hasInterface(EventNames::WheelEvent) || event->type() == EventTypeNames::blur))
         forwardEvent(event);
     else if (layoutObject() && event->isBeforeTextInsertedEvent())
         handleBeforeTextInsertedEvent(static_cast<BeforeTextInsertedEvent*>(event));
@@ skipping 385 matching lines @@
 
 void HTMLTextAreaElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     const HTMLTextAreaElement& sourceElement = static_cast<const HTMLTextAreaElement&>(source);
     setValueCommon(sourceElement.value(), DispatchNoEvent, SetSeletion);
     m_isDirty = sourceElement.m_isDirty;
     HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(source);
 }
 
 } // namespace blink