Correctly track lifetime of promise rejection events

Source/bindings/core/v8/SharedPersistent.h

Index: Source/bindings/core/v8/SharedPersistent.h
diff --git a/Source/bindings/core/v8/SharedPersistent.h b/Source/bindings/core/v8/SharedPersistent.h
index 5fd390c32bc5487c966168cdd4dfc576d18bf013..b66a50427fe23ed407f7f8ac83c2a5b24a800cd7 100644
--- a/Source/bindings/core/v8/SharedPersistent.h
+++ b/Source/bindings/core/v8/SharedPersistent.h
@@ -54,6 +54,11 @@ public:
 
     bool isEmpty() { return m_value.isEmpty(); }
 
+    void setReference(const v8::Persistent<v8::Object>& parent, v8::Isolate* isolate)
+    {
+        m_value.setReference(parent, isolate);
+    }
+
     bool operator==(const SharedPersistent<T>& other)
     {
         return m_value == other.m_value;