[api] Add interceptor for defineProperty().

src/objects.h

 // Copyright 2015 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 <memory>
 
@@ skipping 10773 matching lines @@
 };
 
 
 class InterceptorInfo: public Struct {
  public:
   DECL_ACCESSORS(getter, Object)
   DECL_ACCESSORS(setter, Object)
   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)
   DECL_BOOLEAN_ACCESSORS(non_masking)
 
   inline int flags() const;
   inline void set_flags(int flags);
 
   DECLARE_CAST(InterceptorInfo)
 
   // Dispatched behavior.
   DECLARE_PRINTER(InterceptorInfo)
   DECLARE_VERIFIER(InterceptorInfo)
 
   static const int kGetterOffset = HeapObject::kHeaderSize;
   static const int kSetterOffset = kGetterOffset + kPointerSize;
   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;
 
   static const int kCanInterceptSymbolsBit = 0;
   static const int kAllCanReadBit = 1;
   static const int kNonMasking = 2;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(InterceptorInfo);
 };
@@ skipping 377 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_