[heap] Marking cleanup

src/heap/mark-compact-inl.h

Index: src/heap/mark-compact-inl.h
diff --git a/src/heap/mark-compact-inl.h b/src/heap/mark-compact-inl.h
index 648bf4673c5bade4d14a3c8bf88610d91f51b150..b63aa349a539150203d74df8086379933db8771d 100644
--- a/src/heap/mark-compact-inl.h
+++ b/src/heap/mark-compact-inl.h
@@ -36,25 +36,13 @@ void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
   }
 }
 
-void MarkCompactCollector::SetMark(HeapObject* obj) {
-  DCHECK(ObjectMarking::IsWhite(obj));
-  ObjectMarking::WhiteToBlack(obj);
-}
-
-
-bool MarkCompactCollector::IsMarked(Object* obj) {
-  DCHECK(obj->IsHeapObject());
-  return ObjectMarking::IsBlackOrGrey(HeapObject::cast(obj));
-}
-
-
 void MarkCompactCollector::RecordSlot(HeapObject* object, Object** slot,
                                       Object* target) {
   Page* target_page = Page::FromAddress(reinterpret_cast<Address>(target));
   Page* source_page = Page::FromAddress(reinterpret_cast<Address>(object));
   if (target_page->IsEvacuationCandidate() &&
       !ShouldSkipEvacuationSlotRecording(object)) {
-    DCHECK(IsMarked(object));
+    DCHECK(ObjectMarking::IsBlackOrGrey(object));
     RememberedSet<OLD_TO_OLD>::Insert(source_page,
                                       reinterpret_cast<Address>(slot));
   }