Allow PeerConnection to be garbage collected after close().

Source/modules/mediastream/RTCDataChannel.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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 namespace blink {
 class WebRTCDataChannelHandler;
 class WebRTCPeerConnectionHandler;
 struct WebRTCDataChannelInit;
 }
 
 namespace WebCore {
 
 class Blob;
 class ExceptionState;
+class RTCPeerConnection;
 
 class RTCDataChannel FINAL : public RefCountedWillBeRefCountedGarbageCollected<RTCDataChannel>, public ScriptWrappable, public EventTargetWithInlineData, public blink::WebRTCDataChannelHandlerClient {
     REFCOUNTED_EVENT_TARGET(RTCDataChannel);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(RTCDataChannel);
 public:
-    static PassRefPtrWillBeRawPtr<RTCDataChannel> create(ExecutionContext*, PassOwnPtr<blink::WebRTCDataChannelHandler>);
-    static PassRefPtrWillBeRawPtr<RTCDataChannel> create(ExecutionContext*, blink::WebRTCPeerConnectionHandler*, const String& label, const blink::WebRTCDataChannelInit&, ExceptionState&);
+    static PassRefPtrWillBeRawPtr<RTCDataChannel> create(ExecutionContext*, WeakPtrWillBeRawPtr<RTCPeerConnection>, PassOwnPtr<blink::WebRTCDataChannelHandler>);
+    static PassRefPtrWillBeRawPtr<RTCDataChannel> create(ExecutionContext*, WeakPtrWillBeRawPtr<RTCPeerConnection>, blink::WebRTCPeerConnectionHandler*, const String& label, const blink::WebRTCDataChannelInit&, ExceptionState&);
     virtual ~RTCDataChannel();
 
     String label() const;
 
     // DEPRECATED
     bool reliable() const;
 
     bool ordered() const;
     unsigned short maxRetransmitTime() const;
     unsigned short maxRetransmits() const;
@@ skipping 20 matching lines @@
 
     void stop();
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE;
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
-    RTCDataChannel(ExecutionContext*, PassOwnPtr<blink::WebRTCDataChannelHandler>);
+    RTCDataChannel(ExecutionContext*, WeakPtrWillBeRawPtr<RTCPeerConnection>, PassOwnPtr<blink::WebRTCDataChannelHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDataChannel>*);
 
     ExecutionContext* m_executionContext;
 
     // blink::WebRTCDataChannelHandlerClient
     virtual void didChangeReadyState(blink::WebRTCDataChannelHandlerClient::ReadyState) OVERRIDE;
     virtual void didReceiveStringData(const blink::WebString&) OVERRIDE;
     virtual void didReceiveRawData(const char*, size_t) OVERRIDE;
     virtual void didDetectError() OVERRIDE;
 
+    void stopAndFireCloseEventIfCreatorWasDeleted();
+
     OwnPtr<blink::WebRTCDataChannelHandler> m_handler;
 
     bool m_stopped;
 
     blink::WebRTCDataChannelHandlerClient::ReadyState m_readyState;
 
     enum BinaryType {
         BinaryTypeBlob,
         BinaryTypeArrayBuffer
     };
     BinaryType m_binaryType;
 
     Timer<RTCDataChannel> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event> > m_scheduledEvents;
+
+    WeakPtrWillBeWeakMember<RTCPeerConnection> m_creator;
 };
 
 } // namespace WebCore
 
 #endif // RTCDataChannel_h