Get rid of OS(SOLARIS) and OS(HURD).

Source/wtf/MathExtras.h

 /*
  * Copyright (C) 2006, 2007, 2008, 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 17 matching lines @@
 
 #include "wtf/CPU.h"
 #include "wtf/StdLibExtras.h"
 #include <algorithm>
 #include <cmath>
 #include <float.h>
 #include <limits>
 #include <stdint.h>
 #include <stdlib.h>
 
-#if OS(SOLARIS)
-#include <ieeefp.h>
-#endif
-
 #if OS(OPENBSD)
 #include <sys/types.h>
 #include <machine/ieee.h>
 #endif
 
 #ifndef M_PI
 const double piDouble = 3.14159265358979323846;
 const float piFloat = 3.14159265358979323846f;
 #else
 const double piDouble = M_PI;
@@ skipping 18 matching lines @@
 
 #if OS(DARWIN)
 
 // Work around a bug in the Mac OS X libc where ceil(-0.1) return +0.
 inline double wtf_ceil(double x) { return copysign(ceil(x), x); }
 
 #define ceil(x) wtf_ceil(x)
 
 #endif
 
-#if OS(SOLARIS)
-
-namespace std {
-
-#ifndef isfinite
-inline bool isfinite(double x) { return finite(x) && !isnand(x); }
-#endif
-#ifndef signbit
-inline bool signbit(double x) { return copysign(1.0, x) < 0; }
-#endif
-#ifndef isinf
-inline bool isinf(double x) { return !finite(x) && !isnand(x); }
-#endif
-
-} // namespace std
-
-#endif
-
 #if OS(OPENBSD)
 
 namespace std {
 
 #ifndef isfinite
 inline bool isfinite(double x) { return finite(x); }
 #endif
 #ifndef signbit
 inline bool signbit(double x) { struct ieee_double *p = (struct ieee_double *)&x; return p->dbl_sign; }
 #endif
@@ skipping 230 matching lines @@
     if (i >> 2)
         log2 += 2, i >>= 2;
     if (i >> 1)
         log2 += 1;
     return log2;
 }
 
 } // namespace WTF
 
 #endif // #ifndef WTF_MathExtras_h