[runtime] Remove redundant StoreMode enum.

src/map-updater.cc

 // Copyright 2017 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.
 
 #include "src/map-updater.h"
 
 #include "src/field-type.h"
 #include "src/handles.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
@@ skipping 132 matching lines @@
   DCHECK(old_map_->is_deprecated());
 
   if (FindRootMap() == kEnd) return result_map_;
   if (FindTargetMap() == kEnd) return result_map_;
   ConstructNewMap();
   DCHECK_EQ(kEnd, state_);
   return result_map_;
 }
 
 MapUpdater::State MapUpdater::CopyGeneralizeAllFields(const char* reason) {
-  StoreMode store_mode =
-      modified_descriptor_ >= 0 ? FORCE_FIELD : ALLOW_IN_DESCRIPTOR;
-  result_map_ = Map::CopyGeneralizeAllFields(
-      old_map_, new_elements_kind_, modified_descriptor_, store_mode, new_kind_,
-      new_attributes_, reason);
+  result_map_ = Map::CopyGeneralizeAllFields(old_map_, new_elements_kind_,
+                                             modified_descriptor_, new_kind_,
+                                             new_attributes_, reason);
   state_ = kEnd;
   return state_;  // Done.
 }
 
 MapUpdater::State MapUpdater::TryRecofigureToDataFieldInplace() {
   // If it's just a representation generalization case (i.e. property kind and
   // attributes stays unchanged) it's fine to transition from None to anything
   // but double without any modification to the object, because the default
   // uninitialized value for representation None can be overwritten by both
   // smi and tagged values. Doubles, however, would require a box allocation.
@@ skipping 440 matching lines @@
   // the new descriptors to maintain descriptors sharing invariant.
   split_map->ReplaceDescriptors(*new_descriptors, *new_layout_descriptor);
 
   result_map_ = new_map;
   state_ = kEnd;
   return state_;  // Done.
 }
 
 }  // namespace internal
 }  // namespace v8