Remove the last remaining PLATFORM() bits from WebCore.

Source/WebCore/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 1045 matching lines @@
     }
 
     if (!selectedOption && firstOption && !m_multiple && m_size <= 1)
         firstOption->setSelectedState(true);
 
     setOptionsChangedOnRenderer();
     setNeedsStyleRecalc();
     setNeedsValidityCheck();
 }
 
-#if (!PLATFORM(WIN) && !(OS(WINDOWS)))
+#if !OS(WINDOWS)
 bool HTMLSelectElement::platformHandleKeydownEvent(KeyboardEvent* event)
 {
     const Page* page = document()->page();
     RefPtr<RenderTheme> renderTheme = page ? page->theme() : RenderTheme::defaultTheme();
 
     if (!renderTheme->popsMenuByArrowKeys())
         return false;
 
     if (!isSpatialNavigationEnabled(document()->frame())) {
         if (event->keyIdentifier() == "Down" || event->keyIdentifier() == "Up") {
@@ skipping 216 matching lines @@
         // Calling focus() may cause us to lose our renderer, in which case do not want to handle the event.
         if (!renderer())
             return;
 
         // Convert to coords relative to the list box if needed.
         MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
         IntPoint localOffset = roundedIntPoint(renderer()->absoluteToLocal(mouseEvent->absoluteLocation(), UseTransforms));
         int listIndex = toRenderListBox(renderer())->listIndexAtOffset(toIntSize(localOffset));
         if (listIndex >= 0) {
             if (!isDisabledFormControl()) {
-#if PLATFORM(MAC) || (PLATFORM(CHROMIUM) && OS(DARWIN))
+#if OS(DARWIN)
                 updateSelectedState(listIndex, mouseEvent->metaKey(), mouseEvent->shiftKey());
 #else
                 updateSelectedState(listIndex, mouseEvent->ctrlKey(), mouseEvent->shiftKey());
 #endif
             }
             if (Frame* frame = document()->frame())
                 frame->eventHandler()->setMouseDownMayStartAutoscroll();
 
             event->setDefaultHandled();
         }
@@ skipping 241 matching lines @@
     const Vector<HTMLElement*>& items = listItems();
     for (unsigned i = 0; i < items.size(); ++i) {
         if (items[i]->hasTagName(optionTag))
             ++options;
     }
 
     return options;
 }
 
 } // namespace