ES6 symbols: Allow symbols as property names

src/transitions.cc

Index: src/transitions.cc
diff --git a/src/transitions.cc b/src/transitions.cc
index 56b6caf3db0a433e60c6850b41b73afbf6b6c080..adbe6a1b32c9a33df38548d6f99dd42593bb7f2a 100644
--- a/src/transitions.cc
+++ b/src/transitions.cc
@@ -65,13 +65,13 @@ void TransitionArray::NoIncrementalWriteBarrierCopyFrom(TransitionArray* origin,
 }
 
 
-static bool InsertionPointFound(String* key1, String* key2) {
+static bool InsertionPointFound(Name* key1, Name* key2) {
   return key1->Hash() > key2->Hash();
 }
 
 
 MaybeObject* TransitionArray::NewWith(SimpleTransitionFlag flag,
-                                      String* key,
+                                      Name* key,
                                       Map* target,
                                       Object* back_pointer) {
   TransitionArray* result;
@@ -107,7 +107,7 @@ MaybeObject* TransitionArray::ExtendToFullTransitionArray() {
 }
 
 
-MaybeObject* TransitionArray::CopyInsert(String* name, Map* target) {
+MaybeObject* TransitionArray::CopyInsert(Name* name, Map* target) {
   TransitionArray* result;
 
   int number_of_transitions = this->number_of_transitions();