Add method to notify blink when PeerConnection is closed in Chrome

Source/modules/mediastream/RTCPeerConnection.h

 /*
  * 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 111 matching lines @@
     // WebRTCPeerConnectionHandlerClient
     virtual void negotiationNeeded() OVERRIDE;
     virtual void didGenerateICECandidate(const WebRTCICECandidate&) OVERRIDE;
     virtual void didChangeSignalingState(SignalingState) OVERRIDE;
     virtual void didChangeICEGatheringState(ICEGatheringState) OVERRIDE;
     virtual void didChangeICEConnectionState(ICEConnectionState) OVERRIDE;
     virtual void didAddRemoteStream(const WebMediaStream&) OVERRIDE;
     virtual void didRemoveRemoteStream(const WebMediaStream&) OVERRIDE;
     virtual void didAddRemoteDataChannel(WebRTCDataChannelHandler*) OVERRIDE;
     virtual void releasePeerConnectionHandler() OVERRIDE;
+    virtual void closePeerConnection() OVERRIDE;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE;
 
     // ActiveDOMObject
     virtual void suspend() OVERRIDE;
     virtual void resume() OVERRIDE;
     virtual void stop() OVERRIDE;
     // We keep the this object alive until either stopped or closed.
@@ skipping 11 matching lines @@
     static PassRefPtr<RTCOfferOptions> parseOfferOptions(const Dictionary&, ExceptionState&);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void dispatchScheduledEvent();
     bool hasLocalStreamWithTrackId(const String& trackId);
 
     void changeSignalingState(WebRTCPeerConnectionHandlerClient::SignalingState);
     void changeIceGatheringState(WebRTCPeerConnectionHandlerClient::ICEGatheringState);
     void changeIceConnectionState(WebRTCPeerConnectionHandlerClient::ICEConnectionState);
 
+    void closeInternal();
+
     SignalingState m_signalingState;
     ICEGatheringState m_iceGatheringState;
     ICEConnectionState m_iceConnectionState;
 
     MediaStreamVector m_localStreams;
     MediaStreamVector m_remoteStreams;
 
     HeapVector<Member<RTCDataChannel> > m_dataChannels;
 
     OwnPtr<WebRTCPeerConnectionHandler> m_peerHandler;
 
     AsyncMethodRunner<RTCPeerConnection> m_dispatchScheduledEventRunner;
     WillBeHeapVector<RefPtrWillBeMember<Event> > m_scheduledEvents;
 
     bool m_stopped;
     bool m_closed;
 };
 
 } // namespace blink
 
 #endif // RTCPeerConnection_h