Refactoring button field and its type (2nd try)

third_party/WebKit/Source/core/dom/Node.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, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 2077 matching lines @@
         if (Page* page = document().page())
             page->contextMenuController().handleContextMenuEvent(event);
     } else if (eventType == EventTypeNames::textInput) {
         if (event->hasInterface(EventNames::TextEvent)) {
             if (LocalFrame* frame = document().frame())
                 frame->eventHandler().defaultTextInputEventHandler(toTextEvent(event));
         }
 #if OS(WIN)
     } else if (eventType == EventTypeNames::mousedown && event->isMouseEvent()) {
         MouseEvent* mouseEvent = toMouseEvent(event);
-        if (mouseEvent->button() == MiddleButton) {
+        if (mouseEvent->button() == static_cast<short>(WebPointerProperties::Button::Middle)) {
             if (enclosingLinkEventParentOrSelf())
                 return;
 
             // Avoid that canBeScrolledAndHasScrollableArea changes layout tree
             // structure.
             // FIXME: We should avoid synchronous layout if possible. We can
             // remove this synchronous layout if we avoid synchronous layout in
             // LayoutTextControlSingleLine::scrollHeight
             document().updateStyleAndLayoutIgnorePendingStylesheets();
             LayoutObject* layoutObject = this->layoutObject();
@@ skipping 320 matching lines @@
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
     else
         fprintf(stderr, "Cannot showNodePath for (nil)\n");
 }
 
 #endif