Get rid of fastMallocGoodSize() and replace it with something generic.

Source/wtf/FastMalloc.h

 /*
  *  Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 14 matching lines @@
 #include <cstddef>
 
 namespace WTF {
 
     // These functions crash safely if an allocation fails.
     WTF_EXPORT void* fastMalloc(size_t);
     WTF_EXPORT void* fastZeroedMalloc(size_t);
     WTF_EXPORT void* fastCalloc(size_t numElements, size_t elementSize);
     WTF_EXPORT void* fastRealloc(void*, size_t);
     WTF_EXPORT char* fastStrDup(const char*);
-    WTF_EXPORT size_t fastMallocGoodSize(size_t);
 
     WTF_EXPORT void fastFree(void*);
 
 #ifndef NDEBUG
     WTF_EXPORT void fastMallocForbid();
     WTF_EXPORT void fastMallocAllow();
 #endif
 
     WTF_EXPORT void releaseFastMallocFreeMemory();
 
     struct FastMallocStatistics {
         size_t reservedVMBytes;
         size_t committedVMBytes;
         size_t freeListBytes;
     };
     WTF_EXPORT FastMallocStatistics fastMallocStatistics();
 
     // This defines a type which holds an unsigned integer and is the same
     // size as the minimally aligned memory allocation.
     typedef unsigned long long AllocAlignmentInteger;
 
 } // namespace WTF
 
 using WTF::fastCalloc;
 using WTF::fastFree;
 using WTF::fastMalloc;
-using WTF::fastMallocGoodSize;
 using WTF::fastRealloc;
 using WTF::fastStrDup;
 using WTF::fastZeroedMalloc;
 
 #ifndef NDEBUG
 using WTF::fastMallocForbid;
 using WTF::fastMallocAllow;
 #endif
 
 #endif /* WTF_FastMalloc_h */