Remove 3D_RENDERING define from Blink

Source/WebCore/rendering/RenderLayerCompositor.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 52 matching lines @@
 #include <wtf/TemporaryChange.h>
 
 #if !LOG_DISABLED
 #include <wtf/CurrentTime.h>
 #endif
 
 #ifndef NDEBUG
 #include "RenderTreeAsText.h"
 #endif
 
-#if ENABLE(3D_RENDERING)
-// This symbol is used to determine from a script whether 3D rendering is enabled (via 'nm').
-bool WebCoreHas3DRendering = true;
-#endif
-
 #define WTF_USE_COMPOSITING_FOR_SMALL_CANVASES 1
 
 static const int canvasAreaThresholdRequiringCompositing = 50 * 100;
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 class RenderLayerCompositor::OverlapMap {
     WTF_MAKE_NONCOPYABLE(OverlapMap);
@@ skipping 2695 matching lines @@
     info.addMember(m_layerForOverhangAreas, "layerForOverhangAreas");
     info.addMember(m_contentShadowLayer, "contentShadowLayer");
     info.addMember(m_layerForTopOverhangArea, "layerForTopOverhangArea");
     info.addMember(m_layerForBottomOverhangArea, "layerForBottomOverhangArea");
     info.addMember(m_layerForHeader, "layerForHeader");
     info.addMember(m_layerForFooter, "layerForFooter");
 #endif
 }
 
 } // namespace WebCore