Handle CALLBACKS transitions in NormalizeProperties, CopyInsert and RemoveTransitions.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index bc18bf8fabde108e6acfbbfa49e2d5fe878beb0c..84ba8b57528aa22a635b7337bbb61ee9240b53be 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2414,6 +2414,10 @@ class DescriptorArray: public FixedArray {
   inline bool IsNullDescriptor(int descriptor_number);
   inline bool IsDontEnum(int descriptor_number);
 
+  // The return value used to signal allocation failure only.
+  MaybeObject* GetDescriptorWithoutTransitions(int descriptor_number,
+                                               Descriptor* desc);
+
   class WhitenessWitness {
    public:
     inline explicit WhitenessWitness(DescriptorArray* array);
@@ -7755,6 +7759,8 @@ class AccessorPair: public Struct {
 
   static inline AccessorPair* cast(Object* obj);
 
+  MaybeObject* CopyWithoutTransitions();
+
 #ifdef OBJECT_PRINT
   void AccessorPairPrint(FILE* out = stdout);
 #endif