[api] Default native data property setter to replace the setter if the property is writable.

src/accessors.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_ACCESSORS_H_
 #define V8_ACCESSORS_H_
 
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/globals.h"
@@ skipping 26 matching lines @@
   V(ScriptLineEnds)               \
   V(ScriptLineOffset)             \
   V(ScriptName)                   \
   V(ScriptSource)                 \
   V(ScriptType)                   \
   V(ScriptSourceUrl)              \
   V(ScriptSourceMappingUrl)       \
   V(ScriptIsEmbedderDebugScript)  \
   V(StringLength)
 
+#define ACCESSOR_SETTER_LIST(V)        \
+  V(ReconfigureToDataProperty)         \
+  V(ObservedReconfigureToDataProperty) \
+  V(ArrayLengthSetter)                 \
+  V(FunctionPrototypeSetter)
+
 // Accessors contains all predefined proxy accessors.
 
 class Accessors : public AllStatic {
  public:
   // Accessor descriptors.
 #define ACCESSOR_INFO_DECLARATION(name)                   \
   static void name##Getter(                               \
       v8::Local<v8::Name> name,                           \
       const v8::PropertyCallbackInfo<v8::Value>& info);   \
-  static void name##Setter(                               \
-      v8::Local<v8::Name> name,                           \
-      v8::Local<v8::Value> value,                         \
-      const v8::PropertyCallbackInfo<void>& info);   \
   static Handle<AccessorInfo> name##Info(                 \
       Isolate* isolate,                                   \
       PropertyAttributes attributes);
   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
 #undef ACCESSOR_INFO_DECLARATION
 
+#define ACCESSOR_SETTER_DECLARATION(name)                                \
+  static void name(v8::Local<v8::Name> name, v8::Local<v8::Value> value, \
+                   const v8::PropertyCallbackInfo<void>& info);
+  ACCESSOR_SETTER_LIST(ACCESSOR_SETTER_DECLARATION)
+#undef ACCESSOR_SETTER_DECLARATION
+
   enum DescriptorId {
 #define ACCESSOR_INFO_DECLARATION(name) \
     k##name##Getter, \
     k##name##Setter,
   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
 #undef ACCESSOR_INFO_DECLARATION
     descriptorCount
   };
 
   // Accessor functions called directly from the runtime system.
@@ skipping 23 matching lines @@
       Handle<Name> name,
       AccessorNameGetterCallback getter,
       AccessorNameSetterCallback setter,
       PropertyAttributes attributes);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ACCESSORS_H_