Accessor functions should have no prototype property

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 6929 matching lines @@
 
   // Indicates that this function is a generator.
   DECL_BOOLEAN_ACCESSORS(is_generator)
 
   // Indicates that this function is an arrow function.
   DECL_BOOLEAN_ACCESSORS(is_arrow)
 
   // 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)
 
   // Indicates that this function is an asm function.
   DECL_BOOLEAN_ACCESSORS(asm_function)
 
   // Indicates that the the shared function info is deserialized from cache.
   DECL_BOOLEAN_ACCESSORS(deserialized)
 
   inline FunctionKind kind();
@@ skipping 230 matching lines @@
     kInlineBuiltin,
     kBoundFunction,
     kIsAnonymous,
     kNameShouldPrintAsAnonymous,
     kIsFunction,
     kDontCache,
     kDontFlush,
     kIsArrow,
     kIsGenerator,
     kIsConciseMethod,
+    kIsAccessorFunction,
     kIsDefaultConstructor,
     kIsSubclassConstructor,
     kIsAsmFunction,
     kDeserialized,
     kCompilerHintsCount  // Pseudo entry
   };
   // 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> {};
   class ICAgeBits : public BitField<int, 22, 8> {};
 
   class OptCountBits : public BitField<int, 0, 22> {};
   class DisabledOptimizationReasonBits : public BitField<int, 22, 8> {};
 
  private:
 #if V8_HOST_ARCH_32_BIT
@@ skipping 3738 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_