Always inline BitCast.

src/utils.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 766 matching lines @@
 
 template <class Dest, class Source>
 struct BitCastHelper<Dest, Source*> {
   INLINE(static Dest cast(Source* source)) {
     return BitCastHelper<Dest, uintptr_t>::
         cast(reinterpret_cast<uintptr_t>(source));
   }
 };
 
 template <class Dest, class Source>
+INLINE(Dest BitCast(const Source& source));
+
+template <class Dest, class Source>
 inline Dest BitCast(const Source& source) {
   return BitCastHelper<Dest, Source>::cast(source);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_UTILS_H_