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

third_party/WebKit/Source/modules/websockets/DOMWebSocket.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 200 matching lines @@
 {
     exceptionState.throwDOMException(InvalidStateError, "Still in CONNECTING state.");
 }
 
 const char* DOMWebSocket::subprotocolSeperator()
 {
     return ", ";
 }
 
 DOMWebSocket::DOMWebSocket(ExecutionContext* context)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , m_state(CONNECTING)
     , m_bufferedAmount(0)
     , m_consumedBufferedAmount(0)
     , m_bufferedAmountAfterClose(0)
     , m_binaryType(BinaryTypeBlob)
     , m_subprotocol("")
     , m_extensions("")
     , m_eventQueue(EventQueue::create(this))
     , m_bufferedAmountConsumeTimer(this, &DOMWebSocket::reflectBufferedAmountConsumption)
 {
@@ skipping 481 matching lines @@
 DEFINE_TRACE(DOMWebSocket)
 {
     visitor->trace(m_channel);
     visitor->trace(m_eventQueue);
     WebSocketChannelClient::trace(visitor);
     RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink