[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/indexeddb/IDBDatabase.idl

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
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  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
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 // https://w3c.github.io/IndexedDB/#idl-def-IDBDatabase
 
 [
+    ActiveScriptWrappable,
+    DependentLifetime,
     Exposed=(Window,Worker),
-    DependentLifetime,
     GarbageCollected,
 ] interface IDBDatabase : EventTarget {
     readonly attribute DOMString name;
     readonly attribute unsigned long long version;
     [Measure] readonly attribute DOMStringList objectStoreNames;
 
     [RaisesException] IDBObjectStore createObjectStore(DOMString name, optional IDBObjectStoreParameters options);
     [RaisesException] void deleteObjectStore(DOMString name);
     [CallWith=ScriptState, RaisesException] IDBTransaction transaction((DOMString or sequence<DOMString> or DOMStringList) storeNames, optional IDBTransactionMode mode = "readonly");
     void close();
 
     attribute EventHandler onabort;
     attribute EventHandler onclose;
     attribute EventHandler onerror;
     attribute EventHandler onversionchange;
 };