[Heap] Remove concept of MarkingParity.

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_
 
 #include "src/heap/array-buffer-tracker.h"
 #include "src/heap/objects-visiting.h"
 #include "src/ic/ic-state.h"
@@ skipping 394 matching lines @@
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitCode(Map* map,
                                                     HeapObject* object) {
   typedef FlexibleBodyVisitor<StaticVisitor, Code::BodyDescriptor, void>
       CodeBodyVisitor;
   Heap* heap = map->GetHeap();
   Code* code = Code::cast(object);
   if (FLAG_age_code && !heap->isolate()->serializer_enabled()) {
-    code->MakeOlder(heap->mark_compact_collector()->marking_parity());
+    code->MakeOlder();
   }
   CodeBodyVisitor::Visit(map, object);
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitSharedFunctionInfo(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
   SharedFunctionInfo* shared = SharedFunctionInfo::cast(object);
@@ skipping 222 matching lines @@
   typedef FlexibleBodyVisitor<StaticVisitor, JSFunction::BodyDescriptorWeakCode,
                               void> JSFunctionWeakCodeBodyVisitor;
   JSFunctionWeakCodeBodyVisitor::Visit(map, object);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_VISITING_INL_H_