[api] Expose ES6 7.3.14 SetIntegrityLevel on v8::Object

include/v8.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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 2621 matching lines @@
  *
  * TODO(dcarney): Remove PROHIBITS_OVERWRITING as it is now unused.
  */
 enum AccessControl {
   DEFAULT               = 0,
   ALL_CAN_READ          = 1,
   ALL_CAN_WRITE         = 1 << 1,
   PROHIBITS_OVERWRITING = 1 << 2
 };
 
+/**
+ * Integrity level for objects.
+ */
+enum class IntegrityLevel { kFrozen, kSealed };
 
 /**
  * A JavaScript object (ECMA-262, 4.3.3)
  */
 class V8_EXPORT Object : public Value {
  public:
   V8_DEPRECATE_SOON("Use maybe version",
                     bool Set(Local<Value> key, Local<Value> value));
   V8_WARN_UNUSED_RESULT Maybe<bool> Set(Local<Context> context,
                                         Local<Value> key, Local<Value> value);
@@ skipping 171 matching lines @@
    */
   V8_DEPRECATED("Use maybe version", Local<String> ObjectProtoToString());
   V8_WARN_UNUSED_RESULT MaybeLocal<String> ObjectProtoToString(
       Local<Context> context);
 
   /**
    * Returns the name of the function invoked as a constructor for this object.
    */
   Local<String> GetConstructorName();
 
+  /**
+   * Sets the integrity level of the object.
+   */
+  Maybe<bool> SetIntegrityLevel(Local<Context> context, IntegrityLevel level);
+
   /** Gets the number of internal fields for this Object. */
   int InternalFieldCount();
 
   /** Same as above, but works for Persistents */
   V8_INLINE static int InternalFieldCount(
       const PersistentBase<Object>& object) {
     return object.val_->InternalFieldCount();
   }
 
   /** Gets the value from an internal field. */
@@ skipping 5927 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_