Introduce a new AccessorPair type for handling JavaScript accessors.

src/objects-inl.h

 // Copyright 2011 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 3368 matching lines @@
 ACCESSORS(GlobalObject, global_receiver, JSObject, kGlobalReceiverOffset)
 
 ACCESSORS(JSGlobalProxy, context, Object, kContextOffset)
 
 ACCESSORS(AccessorInfo, getter, Object, kGetterOffset)
 ACCESSORS(AccessorInfo, setter, Object, kSetterOffset)
 ACCESSORS(AccessorInfo, data, Object, kDataOffset)
 ACCESSORS(AccessorInfo, name, Object, kNameOffset)
 ACCESSORS(AccessorInfo, flag, Smi, kFlagOffset)
 
+ACCESSORS(AccessorPair, getter, Object, kGetterOffset)
+ACCESSORS(AccessorPair, setter, Object, kSetterOffset)
+
 ACCESSORS(AccessCheckInfo, named_callback, Object, kNamedCallbackOffset)
 ACCESSORS(AccessCheckInfo, indexed_callback, Object, kIndexedCallbackOffset)
 ACCESSORS(AccessCheckInfo, data, Object, kDataOffset)
 
 ACCESSORS(InterceptorInfo, getter, Object, kGetterOffset)
 ACCESSORS(InterceptorInfo, setter, Object, kSetterOffset)
 ACCESSORS(InterceptorInfo, query, Object, kQueryOffset)
 ACCESSORS(InterceptorInfo, deleter, Object, kDeleterOffset)
 ACCESSORS(InterceptorInfo, enumerator, Object, kEnumeratorOffset)
 ACCESSORS(InterceptorInfo, data, Object, kDataOffset)
@@ skipping 1370 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_