Remove the USE(OS_RANDOMNESS) guard.

Source/wtf/CryptographicallyRandomNumber.cpp

 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
  * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
@@ skipping 18 matching lines @@
 
 #include "config.h"
 #include "CryptographicallyRandomNumber.h"
 
 #include "OSRandomSource.h"
 #include "StdLibExtras.h"
 #include "ThreadingPrimitives.h"
 
 namespace WTF {
 
-#if USE(OS_RANDOMNESS)
-
 namespace {
 
 class ARC4Stream {
 public:
     ARC4Stream();
 
     uint8_t i;
     uint8_t j;
     uint8_t s[256];
 };
@@ skipping 118 matching lines @@
 uint32_t cryptographicallyRandomNumber()
 {
     return sharedRandomNumberGenerator().randomNumber();
 }
 
 void cryptographicallyRandomValues(void* buffer, size_t length)
 {
     sharedRandomNumberGenerator().randomValues(buffer, length);
 }
 
-#endif
-
 }