Remove references between RTCPeerConnection and RTCDataChannel.

third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h

Index: third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h
diff --git a/third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h b/third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h
index f2a3a9017ebf8187d1f68a84f9255fe1209b8d13..fdda686beae88244eb8a8063db2a9dc92c444129 100644
--- a/third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h
+++ b/third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h
@@ -49,8 +49,8 @@ class MODULES_EXPORT RTCDataChannel final
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(RTCDataChannel);
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static RTCDataChannel* create(ExecutionContext*, RTCPeerConnection*, PassOwnPtr<WebRTCDataChannelHandler>);
-    static RTCDataChannel* create(ExecutionContext*, RTCPeerConnection*, WebRTCPeerConnectionHandler*, const String& label, const WebRTCDataChannelInit&, ExceptionState&);
+    static RTCDataChannel* create(ExecutionContext*, PassOwnPtr<WebRTCDataChannelHandler>);
+    static RTCDataChannel* create(ExecutionContext*, WebRTCPeerConnectionHandler*, const String& label, const WebRTCDataChannelInit&, ExceptionState&);
     ~RTCDataChannel() override;
 
     ReadyState getHandlerState() const;
@@ -88,14 +88,10 @@ public:
     DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
 
-    void stop();
-
     // EventTarget
     const AtomicString& interfaceName() const override;
     ExecutionContext* executionContext() const override;
 
-    void clearWeakMembers(Visitor*);
-
     // Oilpan: need to eagerly finalize m_handler
     EAGERLY_FINALIZE();
     DECLARE_VIRTUAL_TRACE();
@@ -108,7 +104,7 @@ public:
     void didDetectError() override;
 
 private:
-    RTCDataChannel(ExecutionContext*, RTCPeerConnection*, PassOwnPtr<WebRTCDataChannelHandler>);
+    RTCDataChannel(ExecutionContext*, PassOwnPtr<WebRTCDataChannelHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDataChannel>*);
@@ -117,8 +113,6 @@ private:
 
     OwnPtr<WebRTCDataChannelHandler> m_handler;
 
-    bool m_stopped;
-
     WebRTCDataChannelHandlerClient::ReadyState m_readyState;
 
     enum BinaryType {
@@ -130,8 +124,6 @@ private:
     Timer<RTCDataChannel> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event>> m_scheduledEvents;
 
-    WeakMember<RTCPeerConnection> m_connection;
-
     unsigned m_bufferedAmountLowThreshold;
 
     FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, BufferedAmountLow);