Migrate flags from bit_field2 to bit_field3

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index fcbe4e612d9080d21c0a980a2afed3969e7bec2b..c8fcd02c5d04bcdc4c4d3806f717b85fa22f8906 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -2540,14 +2540,14 @@ bool Map::attached_to_shared_function_info() {
 
 void Map::set_is_shared(bool value) {
   if (value) {
-    set_bit_field2(bit_field2() | (1 << kIsShared));
+    set_bit_field3(bit_field3() | (1 << kIsShared));
   } else {
-    set_bit_field2(bit_field2() & ~(1 << kIsShared));
+    set_bit_field3(bit_field3() & ~(1 << kIsShared));
   }
 }
 
 bool Map::is_shared() {
-  return ((1 << kIsShared) & bit_field2()) != 0;
+  return ((1 << kIsShared) & bit_field3()) != 0;
 }