Revert of [heap] Simplify clearing of normalized map caches.

src/heap/objects-visiting-inl.h

Index: src/heap/objects-visiting-inl.h
diff --git a/src/heap/objects-visiting-inl.h b/src/heap/objects-visiting-inl.h
index ebf1b919f6394d7d4bd13c114e888c773f5909a1..493dce7179c54125f98f614058990679556db2b6 100644
--- a/src/heap/objects-visiting-inl.h
+++ b/src/heap/objects-visiting-inl.h
@@ -295,13 +295,6 @@
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitNativeContext(
     Map* map, HeapObject* object) {
-  // GC can happen when the context is not fully initialized,
-  // so the cache can be undefined.
-  Object* cache =
-      Context::cast(object)->get(Context::NORMALIZED_MAP_CACHE_INDEX);
-  if (cache->IsNormalizedMapCache()) {
-    NormalizedMapCache::cast(cache)->Clear();
-  }
   FixedBodyVisitor<StaticVisitor, Context::MarkCompactBodyDescriptor,
                    void>::Visit(map, object);
 }