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

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

 /*
  * 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) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
@@ skipping 1317 matching lines @@
         if (!LayoutTheme::theme().popsMenuByReturnKey() && keyCode == '\r') {
             if (form())
                 form()->submitImplicitly(event, false);
             dispatchInputAndChangeEventForMenuList();
             event->setDefaultHandled();
         }
     }
 
     if (event->type() == EventTypeNames::mousedown && event->isMouseEvent() && toMouseEvent(event)->button() == LeftButton) {
         InputDeviceCapabilities* sourceCapabilities = toMouseEvent(event)->fromTouch() ? InputDeviceCapabilities::firesTouchEventsSourceCapabilities() : InputDeviceCapabilities::doesntFireTouchEventsSourceCapabilities();
-        focus(true, WebFocusTypeNone, sourceCapabilities);
+        focus(FocusParams(SelectionBehaviorOnFocus::Restore, WebFocusTypeNone, sourceCapabilities));
         if (layoutObject() && layoutObject()->isMenuList() && !isDisabledFormControl()) {
             if (popupIsVisible()) {
                 hidePopup();
             } else {
                 // Save the selection so it can be compared to the new selection
                 // when we call onChange during selectOption, which gets called
                 // from valueChanged, which gets called after the user makes a
                 // selection from the menu.
                 saveLastSelection();
                 // TODO(lanwei): Will check if we need to add InputDeviceCapabilities here
@@ skipping 607 matching lines @@
     m_popupIsVisible = false;
     m_popup = nullptr;
 }
 
 void HTMLSelectElement::resetTypeAheadSessionForTesting()
 {
     m_typeAhead.resetSession();
 }
 
 } // namespace blink