Use GetProperty for getting elements.

src/runtime/runtime-array.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/messages.h"
 #include "src/runtime/runtime-utils.h"
 
@@ skipping 687 matching lines @@
       IterateTypedArrayElements<ExternalFloat64Array, double>(
           isolate, receiver, false, false, visitor);
       break;
     }
     case FLOAT64_ELEMENTS: {
       IterateTypedArrayElements<FixedFloat64Array, double>(
       isolate, receiver, false, false, visitor);
       break;
     }
     case SLOPPY_ARGUMENTS_ELEMENTS: {
-      ElementsAccessor* accessor = receiver->GetElementsAccessor();
       for (uint32_t index = 0; index < length; index++) {
         HandleScope loop_scope(isolate);
-        if (accessor->HasElement(receiver, index)) {
-          Handle<Object> element;
-          ASSIGN_RETURN_ON_EXCEPTION_VALUE(
-              isolate, element, accessor->Get(receiver, receiver, index),
-              false);
-          visitor->visit(index, element);
-        }
+        Handle<Object> element;
+        ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+            isolate, element, Object::GetElement(isolate, receiver, index),
+            false);
+        visitor->visit(index, element);
       }
       break;
     }
   }
   visitor->increase_index_offset(length);
   return true;
 }
 
 
 static bool IsConcatSpreadable(Isolate* isolate, Handle<Object> obj) {
@@ skipping 598 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_FastOneByteArrayJoin) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);
   // Returning undefined means that this fast path fails and one has to resort
   // to a slow path.
   return isolate->heap()->undefined_value();
 }
 }  // namespace internal
 }  // namespace v8