Remove USE(3D_GRAPHICS) as it is always turned on.

Source/core/platform/graphics/filters/custom/CustomFilterMesh.h

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. 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.
@@ skipping 12 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #ifndef CustomFilterMesh_h
 #define CustomFilterMesh_h
 
-#if USE(3D_GRAPHICS)
-
 #include "core/platform/graphics/FloatRect.h"
 #include "core/platform/graphics/GraphicsTypes3D.h"
 #include "core/platform/graphics/filters/custom/CustomFilterOperation.h"
 #include <wtf/RefCounted.h>
 
 namespace WebCore {
 
 class GraphicsContext3D;
 
 class CustomFilterMesh : public RefCounted<CustomFilterMesh> {
@@ skipping 23 matching lines @@
 
     Platform3DObject m_elementsBufferObject;
     unsigned m_indicesCount;
 
     FloatRect m_meshBox;
     CustomFilterMeshType m_meshType;
 };
 
 } // namespace WebCore
 
-#endif // USE(3D_GRAPHICS)
-
 #endif // CustomFilterMesh_h