[api] Add interceptor for defineProperty().

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index a25e2f715aa5bd410ea341d1757276fe49283681..d07808fe1513f33f40c325fc499f5d99d35768b6 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -4438,6 +4438,29 @@ typedef void (*GenericNamedPropertyDeleterCallback)(
 typedef void (*GenericNamedPropertyEnumeratorCallback)(
     const PropertyCallbackInfo<Array>& info);
 
+/**
+ * Interceptor for defineProperty requests on an object.
+ *
+ * Use `info.GetReturnValue()` to indicate whether the request was intercepted
+ * or not. If the definer successfully intercepts the request, i.e., if the
+ * request should not be further executed, call
+ * `info.GetReturnValue().Set(value)`. If the definer
+ * did not intercept the request, i.e., if the request should be handled as
+ * if no interceptor is present, do not not call `Set()`.
+ *
+ * \param property The name of the property for which the request was
+ * intercepted.
+ * \param desc The property descriptor which will be used to define the
+ * property if the request is not intercepted.
+ * \param info Information about the intercepted request, such as
+ * isolate, receiver, return value, or whether running in `'use strict'` mode.
+ * See `PropertyCallbackInfo`.
+ *
+ * See also `ObjectTemplate::SetNamedPropertyHandler`.
+ */
+typedef void (*GenericNamedPropertyDefinerCallback)(
+    Local<Name> key, const PropertyDescriptor& desc,
+    const PropertyCallbackInfo<Value>& info);
 
 /**
  * Returns the value of the property if the getter intercepts the
@@ -4484,6 +4507,9 @@ typedef void (*IndexedPropertyDeleterCallback)(
 typedef void (*IndexedPropertyEnumeratorCallback)(
     const PropertyCallbackInfo<Array>& info);
 
+typedef void (*IndexedPropertyDefinerCallback)(
+    uint32_t index, const PropertyDescriptor& desc,
+    const PropertyCallbackInfo<Value>& info);
 
 /**
  * Access type specification.
@@ -4746,6 +4772,25 @@ struct NamedPropertyHandlerConfiguration {
         query(query),
         deleter(deleter),
         enumerator(enumerator),
+        definer(0),
+        data(data),
+        flags(flags) {}
+
+  NamedPropertyHandlerConfiguration(
+      GenericNamedPropertyGetterCallback getter,
+      GenericNamedPropertySetterCallback setter,
+      GenericNamedPropertyQueryCallback query,
+      GenericNamedPropertyDeleterCallback deleter,
+      GenericNamedPropertyEnumeratorCallback enumerator,
+      GenericNamedPropertyDefinerCallback definer,
+      Local<Value> data = Local<Value>(),
+      PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)
+      : getter(getter),
+        setter(setter),
+        query(query),
+        deleter(deleter),
+        enumerator(enumerator),
+        definer(definer),
         data(data),
         flags(flags) {}
 
@@ -4754,6 +4799,7 @@ struct NamedPropertyHandlerConfiguration {
   GenericNamedPropertyQueryCallback query;
   GenericNamedPropertyDeleterCallback deleter;
   GenericNamedPropertyEnumeratorCallback enumerator;
+  GenericNamedPropertyDefinerCallback definer;
   Local<Value> data;
   PropertyHandlerFlags flags;
 };
@@ -4774,6 +4820,24 @@ struct IndexedPropertyHandlerConfiguration {
         query(query),
         deleter(deleter),
         enumerator(enumerator),
+        definer(0),
+        data(data),
+        flags(flags) {}
+
+  IndexedPropertyHandlerConfiguration(
+      IndexedPropertyGetterCallback getter,
+      IndexedPropertySetterCallback setter, IndexedPropertyQueryCallback query,
+      IndexedPropertyDeleterCallback deleter,
+      IndexedPropertyEnumeratorCallback enumerator,
+      IndexedPropertyDefinerCallback definer,
+      Local<Value> data = Local<Value>(),
+      PropertyHandlerFlags flags = PropertyHandlerFlags::kNone)
+      : getter(getter),
+        setter(setter),
+        query(query),
+        deleter(deleter),
+        enumerator(enumerator),
+        definer(0),
         data(data),
         flags(flags) {}
 
@@ -4782,6 +4846,7 @@ struct IndexedPropertyHandlerConfiguration {
   IndexedPropertyQueryCallback query;
   IndexedPropertyDeleterCallback deleter;
   IndexedPropertyEnumeratorCallback enumerator;
+  IndexedPropertyDefinerCallback definer;
   Local<Value> data;
   PropertyHandlerFlags flags;
 };