Don't insert elements transitions into normalized maps

src/objects.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_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 6210 matching lines @@
 #if TRACE_MAPS
   static void TraceTransition(const char* what, Map* from, Map* to, Name* name);
   static void TraceAllTransitions(Map* map);
 #endif
 
   static inline Handle<Map> CopyInstallDescriptorsForTesting(
       Handle<Map> map, int new_descriptor, Handle<DescriptorArray> descriptors,
       Handle<LayoutDescriptor> layout_descriptor);
 
  private:
-  static void ConnectElementsTransition(Handle<Map> parent, Handle<Map> child);
   static void ConnectTransition(Handle<Map> parent, Handle<Map> child,
                                 Handle<Name> name, SimpleTransitionFlag flag);
 
   bool EquivalentToForTransition(Map* other);
   static Handle<Map> RawCopy(Handle<Map> map, int instance_size);
   static Handle<Map> ShareDescriptor(Handle<Map> map,
                                      Handle<DescriptorArray> descriptors,
                                      Descriptor* descriptor);
   static Handle<Map> CopyInstallDescriptors(
       Handle<Map> map, int new_descriptor, Handle<DescriptorArray> descriptors,
@@ skipping 17 matching lines @@
       PropertyAttributes attributes, const char** reason);
 
   static Handle<Map> CopyNormalized(Handle<Map> map,
                                     PropertyNormalizationMode mode);
 
   // Fires when the layout of an object with a leaf map changes.
   // This includes adding transitions to the leaf map or changing
   // the descriptor array.
   inline void NotifyLeafMapLayoutChange();
 
-  static Handle<Map> TransitionElementsToSlow(Handle<Map> object,
-                                              ElementsKind to_kind);
-
   void DeprecateTransitionTree();
   bool DeprecateTarget(PropertyKind kind, Name* key,
                        PropertyAttributes attributes,
                        DescriptorArray* new_descriptors,
                        LayoutDescriptor* new_layout_descriptor);
 
   Map* FindLastMatchMap(int verbatim, int length, DescriptorArray* descriptors);
 
   // Update field type of the given descriptor to new representation and new
   // type. The type must be prepared for storing in descriptor array:
@@ skipping 4540 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_