Change some integer types to make the x64 Win32 platform happier.

src/objects.h

 // Copyright 2006-2009 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 887 matching lines @@
  public:
   // Returns the integer value.
   inline int value();
 
   // Convert a value to a Smi object.
   static inline Smi* FromInt(int value);
 
   static inline Smi* FromIntptr(intptr_t value);
 
   // Returns whether value can be represented in a Smi.
-  static inline bool IsValid(int value);
+  static inline bool IsValid(intptr_t value);
 
   static inline bool IsIntptrValid(intptr_t);
 
   // Casting.
   static inline Smi* cast(Object* object);
 
   // Dispatched behavior.
   void SmiPrint();
   void SmiPrint(StringStream* accumulator);
 #ifdef DEBUG
@@ skipping 3918 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_