[api] Add interceptor for defineProperty().

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index e109fa68d72db141fbd62564aef50d13072f8e19..0cee2b9d606ad2d2bd6ddcf5a4f39cada3a17acb 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -10791,6 +10791,7 @@ class InterceptorInfo: public Struct {
   DECL_ACCESSORS(query, Object)
   DECL_ACCESSORS(deleter, Object)
   DECL_ACCESSORS(enumerator, Object)
+  DECL_ACCESSORS(definer, Object)
   DECL_ACCESSORS(data, Object)
   DECL_BOOLEAN_ACCESSORS(can_intercept_symbols)
   DECL_BOOLEAN_ACCESSORS(all_can_read)
@@ -10810,7 +10811,8 @@ class InterceptorInfo: public Struct {
   static const int kQueryOffset = kSetterOffset + kPointerSize;
   static const int kDeleterOffset = kQueryOffset + kPointerSize;
   static const int kEnumeratorOffset = kDeleterOffset + kPointerSize;
-  static const int kDataOffset = kEnumeratorOffset + kPointerSize;
+  static const int kDefinerOffset = kEnumeratorOffset + kPointerSize;
+  static const int kDataOffset = kDefinerOffset + kPointerSize;
   static const int kFlagsOffset = kDataOffset + kPointerSize;
   static const int kSize = kFlagsOffset + kPointerSize;