TransitionArray now uses <is_data_property, name, attributes> tuple as a key, which allows to have …

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index af6bb667e16863aefb33957aa22710afc5c5234d..706f5ed2ff837a224f4756bfd9e3ddcd49caa579 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -5819,7 +5819,9 @@ class Map: public HeapObject {
   inline Map* elements_transition_map();
 
   inline Map* GetTransition(int transition_index);
-  inline int SearchTransition(Name* name);
+  inline int SearchSpecialTransition(Symbol* name);
+  inline int SearchTransition(PropertyType type, Name* name,
+                              PropertyAttributes attributes);
   inline FixedArrayBase* GetInitialElements();
 
   DECL_ACCESSORS(transitions, TransitionArray)
@@ -5957,8 +5959,8 @@ class Map: public HeapObject {
                                Name* name,
                                LookupResult* result);
 
-  inline void LookupTransition(JSObject* holder,
-                               Name* name,
+  inline void LookupTransition(JSObject* holder, Name* name,
+                               PropertyAttributes attributes,
                                LookupResult* result);
 
   inline PropertyDetails GetLastDescriptorDetails();
@@ -6359,7 +6361,9 @@ class Map: public HeapObject {
   void ZapTransitions();
 
   void DeprecateTransitionTree();
-  void DeprecateTarget(Name* key, DescriptorArray* new_descriptors);
+  void DeprecateTarget(PropertyType type, Name* key,
+                       PropertyAttributes attributes,
+                       DescriptorArray* new_descriptors);
 
   Map* FindLastMatchMap(int verbatim, int length, DescriptorArray* descriptors);