Use LookupIterator to transition to accessors

src/lookup-inl.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_LOOKUP_INL_H_
 #define V8_LOOKUP_INL_H_
 
 #include "src/lookup.h"
 
 namespace v8 {
@@ skipping 11 matching lines @@
   if (!check_derived() &&
       !(check_hidden() && next->map()->is_hidden_prototype())) {
     return NULL;
   }
 
   return next;
 }
 
 
 LookupIterator::State LookupIterator::LookupInHolder(Map* map) {
+  STATIC_ASSERT(INTERCEPTOR == BEFORE_PROPERTY);
   DisallowHeapAllocation no_gc;
   switch (state_) {
     case NOT_FOUND:
       if (map->IsJSProxyMap()) {
         return JSPROXY;
       }
       if (check_access_check() && map->is_access_check_needed()) {
         return ACCESS_CHECK;
       }
     // Fall through.
@@ skipping 17 matching lines @@
     case JSPROXY:
       UNREACHABLE();
   }
   UNREACHABLE();
   return state_;
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_LOOKUP_INL_H_