[api] Add interceptor for getOwnPropertyDescriptor().

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 2048 matching lines @@
       Handle<AllocationSite> site = Handle<AllocationSite>::null());
 
   // Gets global object properties.
   inline GlobalDictionary* global_dictionary();
 
   static MaybeHandle<Context> GetFunctionRealm(Handle<JSObject> object);
 
   // [elements]: The elements (properties with names that are integers).
   //
   // Elements can be in two general modes: fast and slow. Each mode
-  // corrensponds to a set of object representations of elements that
+  // corresponds to a set of object representations of elements that
   // have something in common.
   //
   // In the fast mode elements is a FixedArray and so each element can
   // be quickly accessed. This fact is used in the generated code. The
   // elements array can have one of three maps in this mode:
   // fixed_array_map, sloppy_arguments_elements_map or
   // fixed_cow_array_map (for copy-on-write arrays). In the latter case
   // the elements array may be shared by a few objects and so before
   // writing to any element the array must be copied. Use
   // EnsureWritableFastElements in this case.
@@ skipping 8702 matching lines @@
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(AccessCheckInfo);
 };
 
 
 class InterceptorInfo: public Struct {
  public:
   DECL_ACCESSORS(getter, Object)
   DECL_ACCESSORS(setter, Object)
   DECL_ACCESSORS(query, Object)
+  DECL_ACCESSORS(descriptor, 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 kDescriptorOffset = kQueryOffset + kPointerSize;
+  static const int kDeleterOffset = kDescriptorOffset + kPointerSize;
   static const int kEnumeratorOffset = kDeleterOffset + 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;
 
@@ skipping 380 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_