Remove code for no longer present external array on any object API

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 <iomanip>
 #include <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 3631 matching lines @@
       }
     }
   }
   return transition == nullptr ? Handle<Map>() : handle(transition);
 }
 
 
 static Map* FindClosestElementsTransition(Map* map, ElementsKind to_kind) {
   Map* current_map = map;
 
-  // Support for legacy API: SetIndexedPropertiesTo{External,Pixel}Data
-  // allows to change elements from arbitrary kind to any ExternalArray
-  // elements kind. Satisfy its requirements, checking whether we already
-  // have the cached transition.
-  if (IsExternalArrayElementsKind(to_kind) &&
-      !IsFixedTypedArrayElementsKind(map->elements_kind())) {
-    Map* next_map = map->ElementsTransitionMap();
-    if (next_map != NULL && next_map->elements_kind() == to_kind) {
-      return next_map;
-    }
-    return map;
-  }
-
   ElementsKind kind = map->elements_kind();
   while (kind != to_kind) {
     Map* next_map = current_map->ElementsTransitionMap();
     if (next_map == nullptr) return current_map;
     kind = next_map->elements_kind();
     current_map = next_map;
   }
 
   DCHECK_EQ(to_kind, current_map->elements_kind());
   return current_map;
@@ skipping 12234 matching lines @@
                                             Handle<Object> new_value) {
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 }  // namespace internal
 }  // namespace v8