Simplify DefaultAllocator::Quantizer using partitionAllocActualSize()

Source/wtf/DefaultAllocator.h

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #ifndef WTF_DefaultAllocator_h
 #define WTF_DefaultAllocator_h
 
 // This is the allocator that is used for allocations that are not on the
 // traced, garbage collected heap. It uses FastMalloc for collections,
 // but uses the partition allocator for the backing store of the collections.
 
 #include "wtf/Assertions.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/PartitionAlloc.h"
-#include "wtf/QuantizedAllocation.h"
 #include "wtf/WTF.h"
 
 #include <string.h>
 
 namespace WTF {
 
 class DefaultAllocatorDummyVisitor;
 
+class DefaultAllocatorQuantizer {
+public:
+    template<typename T>
+    static size_t quantizedSize(size_t count)
+    {
+        RELEASE_ASSERT(count <= kMaxUnquantizedAllocation / sizeof(T));
+        return partitionAllocActualSize(Partitions::getBufferPartition(), count * sizeof(T));
+    }
+    static const size_t kMaxUnquantizedAllocation = kGenericMaxDirectMapped;
+};
+
 class DefaultAllocator {
 public:
-    typedef WTF::QuantizedAllocation Quantizer;
+    typedef DefaultAllocatorQuantizer Quantizer;
     typedef DefaultAllocatorDummyVisitor Visitor;
     static const bool isGarbageCollected = false;
     template<typename T, typename Traits>
     struct VectorBackingHelper {
         typedef void Type;
     };
     template<typename T, typename U, typename V, typename W, typename X>
     struct HashTableBackingHelper {
         typedef void Type;
     };
@@ skipping 70 matching lines @@
         ASSERT_NOT_REACHED();
         return false;
     }
 };
 
 } // namespace WTF
 
 using WTF::DefaultAllocator;
 
 #endif // WTF_DefaultAllocator_h