Accessor functions should have no prototype property

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index b49efaa1feb9eb6eb18d01870813954a9c919434..23e7ce9ae4db823f938782fd11a7ad0b5eb4eb6e 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6947,6 +6947,9 @@ class SharedFunctionInfo: public HeapObject {
   // Indicates that this function is a concise method.
   DECL_BOOLEAN_ACCESSORS(is_concise_method)
 
+  // Indicates that this function is an accessor (getter or setter).
+  DECL_BOOLEAN_ACCESSORS(is_accessor_function)
+
   // Indicates that this function is a default constructor.
   DECL_BOOLEAN_ACCESSORS(is_default_constructor)
 
@@ -7197,6 +7200,7 @@ class SharedFunctionInfo: public HeapObject {
     kIsArrow,
     kIsGenerator,
     kIsConciseMethod,
+    kIsAccessorFunction,
     kIsDefaultConstructor,
     kIsSubclassConstructor,
     kIsAsmFunction,
@@ -7206,7 +7210,7 @@ class SharedFunctionInfo: public HeapObject {
   // Add hints for other modes when they're added.
   STATIC_ASSERT(LANGUAGE_END == 3);
 
-  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 5> {};
+  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 6> {};
 
   class DeoptCountBits : public BitField<int, 0, 4> {};
   class OptReenableTriesBits : public BitField<int, 4, 18> {};