Correctly track lifetime of promise rejection events

Source/bindings/core/v8/ScriptPromise.h

Index: Source/bindings/core/v8/ScriptPromise.h
diff --git a/Source/bindings/core/v8/ScriptPromise.h b/Source/bindings/core/v8/ScriptPromise.h
index ff221cf6f6e69cf3892d4495b4ac7500d17af542..ff77ee04794079333926a4d4132616d6ceed9e14 100644
--- a/Source/bindings/core/v8/ScriptPromise.h
+++ b/Source/bindings/core/v8/ScriptPromise.h
@@ -98,6 +98,11 @@ public:
         m_promise.clear();
     }
 
+    void setReference(const v8::Persistent<v8::Object>& parent, v8::Isolate* isolate)
+    {
+        m_promise.setReference(parent, isolate);
+    }
+
     bool operator==(const ScriptPromise& value) const
     {
         return m_promise == value.m_promise;