Revert 146744 "Refactoring: Pull Node::disabled() and Node::isIn..."

Source/WebCore/rendering/RenderThemeMac.mm

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 120 matching lines @@
 enum WKMediaControllerThemeState {
     MediaUIPartDisabledFlag = 1 << 0,
     MediaUIPartPressedFlag = 1 << 1,
     MediaUIPartDrawEndCapsFlag = 1 << 3,
 };
 
 static unsigned getMediaUIPartStateFlags(Node* node)
 {
     unsigned flags = 0;
 
-    if (node->isElementNode() && toElement(node)->disabled())
+    if (node->disabled())
         flags |= MediaUIPartDisabledFlag;
     else if (node->active())
         flags |= MediaUIPartPressedFlag;
     return flags;
 }
 
 // Utility to scale when the UI part are not scaled by wkDrawMediaUIPart
 static FloatRect getUnzoomedRectAndAdjustCurrentContext(RenderObject* o, const PaintInfo& paintInfo, const IntRect &originalRect)
 {
     float zoomLevel = o->style()->effectiveZoom();
@@ skipping 260 matching lines @@
 }
 
 IntPoint RenderThemeMac::volumeSliderOffsetFromMuteButton(RenderBox* muteButtonBox, const IntSize& size) const
 {
     return RenderMediaControls::volumeSliderOffsetFromMuteButton(muteButtonBox, size);
 }
 
 #endif // ENABLE(VIDEO)
 
 } // namespace WebCore