Remove dead code from LookupResult

src/objects.cc

 // Copyright 2013 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.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 2757 matching lines @@
         break;
 
       case CONSTANT:
       case CALLBACKS:
         if (old_type != new_type || old_value != new_value) {
           return MaybeHandle<Map>();
         }
         break;
 
       case NORMAL:
-      case HANDLER:
-      case INTERCEPTOR:
         UNREACHABLE();
     }
   }
   if (new_map->NumberOfOwnDescriptors() != old_nof) return MaybeHandle<Map>();
   return handle(new_map);
 }
 
 
 MaybeHandle<Object> JSObject::SetPropertyWithInterceptor(LookupIterator* it,
                                                          Handle<Object> value) {
@@ skipping 1433 matching lines @@
         break;
       }
       case CALLBACKS: {
         Handle<Name> key(descs->GetKey(i));
         Handle<Object> value(descs->GetCallbacksObject(i), isolate);
         PropertyDetails d = PropertyDetails(
             details.attributes(), CALLBACKS, i + 1);
         dictionary = NameDictionary::Add(dictionary, key, value, d);
         break;
       }
-      case INTERCEPTOR:
-        break;
-      case HANDLER:
       case NORMAL:
         UNREACHABLE();
         break;
     }
   }
 
   // Copy the next enumeration index from instance descriptor.
   dictionary->SetNextEnumerationIndex(real_size + 1);
 
   // From here on we cannot fail and we shouldn't GC anymore.
@@ skipping 2484 matching lines @@
 
     case CONSTANT:
       DCHECK(GetConstant(descriptor) != value ||
              value->FitsRepresentation(details.representation()));
       return GetConstant(descriptor) == value;
 
     case CALLBACKS:
       return false;
 
     case NORMAL:
-    case INTERCEPTOR:
-    case HANDLER:
+      UNREACHABLE();
       break;
   }
 
   UNREACHABLE();
   return false;
 }
 
 
 Handle<Map> Map::PrepareForDataProperty(Handle<Map> map, int descriptor,
                                         Handle<Object> value) {
@@ skipping 9676 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal