Fix Windows x64 build broken by r5299.

src/spaces.cc

 // 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 372 matching lines @@
 #ifdef DEBUG
   ZapBlock(reinterpret_cast<Address>(mem), length);
 #endif
   if (CodeRange::contains(static_cast<Address>(mem))) {
     CodeRange::FreeRawMemory(mem, length);
   } else {
     OS::Free(mem, length);
   }
   Counters::memory_allocated.Decrement(static_cast<int>(length));
   size_ -= static_cast<int>(length);
-  if (executable == EXECUTABLE) size_executable_ -= length;
+  if (executable == EXECUTABLE) size_executable_ -= static_cast<int>(length);
   ASSERT(size_ >= 0);
 }
 
 
 void* MemoryAllocator::ReserveInitialChunk(const size_t requested) {
   ASSERT(initial_chunk_ == NULL);
 
   initial_chunk_ = new VirtualMemory(requested);
   CHECK(initial_chunk_ != NULL);
   if (!initial_chunk_->IsReserved()) {
@@ skipping 2517 matching lines @@
   for (HeapObject* obj = obj_it.next(); obj != NULL; obj = obj_it.next()) {
     if (obj->IsCode()) {
       Code* code = Code::cast(obj);
       code_kind_statistics[code->kind()] += code->Size();
     }
   }
 }
 #endif  // DEBUG
 
 } }  // namespace v8::internal