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

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 56 matching lines @@
 const char IDBDatabase::databaseClosedErrorMessage[] = "The database connection is closed.";
 
 IDBDatabase* IDBDatabase::create(ExecutionContext* context, PassOwnPtr<WebIDBDatabase> database, IDBDatabaseCallbacks* callbacks)
 {
     IDBDatabase* idbDatabase = new IDBDatabase(context, database, callbacks);
     idbDatabase->suspendIfNeeded();
     return idbDatabase;
 }
 
 IDBDatabase::IDBDatabase(ExecutionContext* context, PassOwnPtr<WebIDBDatabase> backend, IDBDatabaseCallbacks* callbacks)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , m_backend(backend)
     , m_databaseCallbacks(callbacks)
 {
     m_databaseCallbacks->connect(this);
 }
 
 IDBDatabase::~IDBDatabase()
 {
     if (!m_closePending && m_backend)
         m_backend->close();
@@ skipping 357 matching lines @@
     return ActiveDOMObject::getExecutionContext();
 }
 
 void IDBDatabase::recordApiCallsHistogram(IndexedDatabaseMethods method)
 {
     DEFINE_THREAD_SAFE_STATIC_LOCAL(EnumerationHistogram, apiCallsHistogram, new EnumerationHistogram("WebCore.IndexedDB.FrontEndAPICalls", IDBMethodsMax));
     apiCallsHistogram.count(method);
 }
 
 } // namespace blink