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

third_party/WebKit/Source/modules/mediastream/RTCPeerConnection.cpp

 /*
  * Copyright (C) 2012 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 385 matching lines @@
 
     RTCPeerConnection* peerConnection = new RTCPeerConnection(context, configuration, constraints, exceptionState);
     peerConnection->suspendIfNeeded();
     if (exceptionState.hadException())
         return 0;
 
     return peerConnection;
 }
 
 RTCPeerConnection::RTCPeerConnection(ExecutionContext* context, RTCConfiguration* configuration, WebMediaConstraints constraints, ExceptionState& exceptionState)
-    : ActiveDOMObject(context)
+    : ActiveScriptWrappable(this)
+    , ActiveDOMObject(context)
     , m_signalingState(SignalingStateStable)
     , m_iceGatheringState(ICEGatheringStateNew)
     , m_iceConnectionState(ICEConnectionStateNew)
     , m_dispatchScheduledEventRunner(AsyncMethodRunner<RTCPeerConnection>::create(this, &RTCPeerConnection::dispatchScheduledEvent))
     , m_stopped(false)
     , m_closed(false)
 {
     Document* document = toDocument(getExecutionContext());
 
     // If we fail, set |m_closed| and |m_stopped| to true, to avoid hitting the assert in the destructor.
@@ skipping 748 matching lines @@
 {
     visitor->trace(m_localStreams);
     visitor->trace(m_remoteStreams);
     visitor->trace(m_dispatchScheduledEventRunner);
     visitor->trace(m_scheduledEvents);
     RefCountedGarbageCollectedEventTargetWithInlineData<RTCPeerConnection>::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink