Fix compilation on 64-bit Windows

src/spaces.h

 // Copyright 2006-2008 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 551 matching lines @@
   // memory is allocated from the code range.  If a code range exists
   // and the freed memory is in it, the code range manages the freed memory.
   static void* AllocateRawMemory(const size_t requested,
                                  size_t* allocated,
                                  Executability executable);
   static void FreeRawMemory(void* buf,
                             size_t length,
                             Executability executable);
   static void PerformAllocationCallback(ObjectSpace space,
                                         AllocationAction action,
-                                        int size);
+                                        size_t size);
 
   static void AddMemoryAllocationCallback(MemoryAllocationCallback callback,
                                           ObjectSpace space,
                                           AllocationAction action);
   static void RemoveMemoryAllocationCallback(
       MemoryAllocationCallback callback);
   static bool MemoryAllocationCallbackRegistered(
       MemoryAllocationCallback callback);
 
   // Returns the maximum available bytes of heaps.
@@ skipping 1667 matching lines @@
 
  private:
   LargeObjectChunk* current_;
   HeapObjectCallback size_func_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_H_