Correctly track lifetime of promise rejection events

Source/bindings/core/v8/ScopedPersistent.h

Index: Source/bindings/core/v8/ScopedPersistent.h
diff --git a/Source/bindings/core/v8/ScopedPersistent.h b/Source/bindings/core/v8/ScopedPersistent.h
index 25856145ec8fa79b36a14169a981605c0aebe3d8..270d60e470eb81d6a1fac5d1961659200900b3b8 100644
--- a/Source/bindings/core/v8/ScopedPersistent.h
+++ b/Source/bindings/core/v8/ScopedPersistent.h
@@ -84,6 +84,11 @@ public:
         m_handle.Reset();
     }
 
+    void setReference(const v8::Persistent<v8::Object>& parent, v8::Isolate* isolate)
+    {
+        isolate->SetReference(parent, m_handle);
+    }
+
     bool operator==(const ScopedPersistent<T>& other)
     {
         return m_handle == other.m_handle;