Version 5.1.281.24 (cherry-pick)

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index a4d1ada86adf84432cb7ef8d662f810a3c43707d..ca99bef92104328261b4c112821bd31270d0d712 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2637,6 +2637,10 @@ enum AccessControl {
   PROHIBITS_OVERWRITING = 1 << 2
 };
 
+/**
+ * Integrity level for objects.
+ */
+enum class IntegrityLevel { kFrozen, kSealed };
 
 /**
  * A JavaScript object (ECMA-262, 4.3.3)
@@ -2828,6 +2832,11 @@ class V8_EXPORT Object : public Value {
    */
   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();