Filter out invalid slots in store buffer eagerly during object transition.

test/cctest/test-unboxed-doubles.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 <stdlib.h>
 #include <utility>
 
 #include "src/v8.h"
 
 #include "src/compilation-cache.h"
@@ skipping 1531 matching lines @@
       map, 0, kData, NONE, Representation::Tagged(), any_type, FORCE_FIELD);
 
   if (write_barrier_kind == OLD_TO_NEW_WRITE_BARRIER) {
     TestWriteBarrier(map, new_map, 2, 1);
   } else {
     CHECK_EQ(OLD_TO_OLD_WRITE_BARRIER, write_barrier_kind);
     TestIncrementalWriteBarrier(map, new_map, 2, 1);
   }
 }
 
-
-// TODO(ishell): enable when this issue is fixed.
-DISABLED_TEST(WriteBarrierObjectShiftFieldsRight) {
+TEST(WriteBarrierObjectShiftFieldsRight) {
   TestWriteBarrierObjectShiftFieldsRight(OLD_TO_NEW_WRITE_BARRIER);
 }
 
 
 TEST(IncrementalWriteBarrierObjectShiftFieldsRight) {
   TestWriteBarrierObjectShiftFieldsRight(OLD_TO_OLD_WRITE_BARRIER);
 }
 
 
 // TODO(ishell): add respective tests for property kind reconfiguring from
 // accessor field to double, once accessor fields are supported by
 // Map::ReconfigureProperty().
 
 
 // TODO(ishell): add respective tests for fast property removal case once
 // Map::ReconfigureProperty() supports that.
 
 #endif