Reland "Merge cellspace into old pointer space"

src/heap/objects-visiting-inl.h

 // 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.
 
 #ifndef V8_OBJECTS_VISITING_INL_H_
 #define V8_OBJECTS_VISITING_INL_H_
 
 
 namespace v8 {
 namespace internal {
@@ skipping 215 matching lines @@
     StaticVisitor::MarkObject(heap, object);
   }
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitCell(Heap* heap,
                                                     RelocInfo* rinfo) {
   DCHECK(rinfo->rmode() == RelocInfo::CELL);
   Cell* cell = rinfo->target_cell();
-  // No need to record slots because the cell space is not compacted during GC.
+  heap->mark_compact_collector()->RecordRelocSlot(rinfo, cell);
   if (!rinfo->host()->IsWeakObject(cell)) {
     StaticVisitor::MarkObject(heap, cell);
   }
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitDebugTarget(Heap* heap,
                                                            RelocInfo* rinfo) {
   DCHECK((RelocInfo::IsJSReturn(rinfo->rmode()) &&
@@ skipping 647 matching lines @@
 
   RelocIterator it(this, mode_mask);
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>(heap);
   }
 }
 }
 }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_VISITING_INL_H_