Handlify JSObject::MigrateInstance and friends.

src/objects-inl.h

 // Copyright 2012 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 1517 matching lines @@
   MaybeObject* maybe = GetElementsTransitionMap(GetIsolate(), elements_kind);
   Map* map;
   if (!maybe->To(&map)) return maybe;
   set_map(map);
   initialize_elements();
 
   return this;
 }
 
 
-MaybeObject* JSObject::TryMigrateInstance() {
-  Map* new_map = map()->CurrentMapForDeprecated();
-  if (new_map == NULL) return Smi::FromInt(0);
-  Map* original_map = map();
-  MaybeObject* maybe_result = MigrateToMap(new_map);
-  JSObject* result;
-  if (FLAG_trace_migration && maybe_result->To(&result)) {
-    PrintInstanceMigration(stdout, original_map, result->map());
-  }
-  return maybe_result;
-}
-
-
 Handle<String> JSObject::ExpectedTransitionKey(Handle<Map> map) {
   DisallowHeapAllocation no_gc;
   if (!map->HasTransitionArray()) return Handle<String>::null();
   TransitionArray* transitions = map->transitions();
   if (!transitions->IsSimpleTransition()) return Handle<String>::null();
   int transition = TransitionArray::kSimpleTransitionIndex;
   PropertyDetails details = transitions->GetTargetDetails(transition);
   Name* name = transitions->GetKey(transition);
   if (details.type() != FIELD) return Handle<String>::null();
   if (details.attributes() != NONE) return Handle<String>::null();
@@ skipping 4692 matching lines @@
 #undef WRITE_UINT32_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_