Remove FeatureDefines.h as it was designed to deal with the variety of build systems for WebKit.

Source/wtf/Platform.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  * Copyright (C) 2010, 2011 Research In Motion Limited. 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 525 matching lines @@
 #endif /* OS(DARWIN) */
 
 #if OS(WINDOWS)
 #define HAVE_SYS_TIMEB_H 1
 #define HAVE_ALIGNED_MALLOC 1
 #define HAVE_ISDEBUGGERPRESENT 1
 #define HAVE_VIRTUALALLOC 1
 #define WTF_USE_OS_RANDOMNESS 1
 #endif
 
-/* ENABLE macro defaults */
-
-/* FIXME: move out all ENABLE() defines from here to FeatureDefines.h */
-
-/* Include feature macros */
-#include <wtf/FeatureDefines.h>
-
 /* FIXME: When all platforms' compositors can compute their own filter outsets, we should remove this define. 
    https://bugs.webkit.org/show_bug.cgi?id=112830 */
 #if USE(CG)
 #define HAVE_COMPOSITOR_FILTER_OUTSETS 1
 #endif
 
 #if !defined(WTF_USE_3D_GRAPHICS)
 #define WTF_USE_3D_GRAPHICS 1
 #endif
 
 #if CPU(ARM_THUMB2)
 #define ENABLE_BRANCH_COMPACTION 1
 #endif
 
 #if !defined(ENABLE_THREADING_LIBDISPATCH) && HAVE(DISPATCH_H)
 #define ENABLE_THREADING_LIBDISPATCH 1
 #elif !defined(ENABLE_THREADING_OPENMP) && defined(_OPENMP)
 #define ENABLE_THREADING_OPENMP 1
 #elif !defined(THREADING_GENERIC)
 #define ENABLE_THREADING_GENERIC 1
 #endif
 
 #if !defined(WTF_USE_ZLIB)
 #define WTF_USE_ZLIB 1
 #endif
 
 #endif /* WTF_Platform_h */