[heap] Use the thread-safe free modes also for RemoveRange in SlotSet.

src/heap/mark-compact.cc

 // Copyright 2012 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/heap/mark-compact.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/sys-info.h"
 #include "src/code-stubs.h"
@@ skipping 3462 matching lines @@
   HeapObject* object = nullptr;
   while ((object = it.Next()) != nullptr) {
     DCHECK(Marking::IsBlack(ObjectMarking::MarkBitFrom(object)));
     if (!visitor->Visit(object)) {
       if (mode == kClearMarkbits) {
         page->markbits()->ClearRange(
             page->AddressToMarkbitIndex(page->area_start()),
             page->AddressToMarkbitIndex(object->address()));
         if (page->old_to_new_slots() != nullptr) {
           page->old_to_new_slots()->RemoveRange(
-              0, static_cast<int>(object->address() - page->address()));
+              0, static_cast<int>(object->address() - page->address()),
+              SlotSet::PREFREE_EMPTY_BUCKETS);
         }
         if (page->typed_old_to_new_slots() != nullptr) {
           RememberedSet<OLD_TO_NEW>::RemoveRangeTyped(page, page->address(),
                                                       object->address());
         }
         RecomputeLiveBytes(page);
       }
       return false;
     }
   }
@@ skipping 513 matching lines @@
       // The target is always in old space, we don't have to record the slot in
       // the old-to-new remembered set.
       DCHECK(!heap()->InNewSpace(target));
       RecordRelocSlot(host, &rinfo, target);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8