Revert of 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 fdda686beae88244eb8a8063db2a9dc92c444129..f2a3a9017ebf8187d1f68a84f9255fe1209b8d13 100644
--- a/third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h
+++ b/third_party/WebKit/Source/modules/mediastream/RTCDataChannel.h
@@ -49,8 +49,8 @@
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(RTCDataChannel);
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static RTCDataChannel* create(ExecutionContext*, PassOwnPtr<WebRTCDataChannelHandler>);
-    static RTCDataChannel* create(ExecutionContext*, WebRTCPeerConnectionHandler*, const String& label, const WebRTCDataChannelInit&, ExceptionState&);
+    static RTCDataChannel* create(ExecutionContext*, RTCPeerConnection*, PassOwnPtr<WebRTCDataChannelHandler>);
+    static RTCDataChannel* create(ExecutionContext*, RTCPeerConnection*, WebRTCPeerConnectionHandler*, const String& label, const WebRTCDataChannelInit&, ExceptionState&);
     ~RTCDataChannel() override;
 
     ReadyState getHandlerState() const;
@@ -88,9 +88,13 @@
     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();
@@ -104,7 +108,7 @@
     void didDetectError() override;
 
 private:
-    RTCDataChannel(ExecutionContext*, PassOwnPtr<WebRTCDataChannelHandler>);
+    RTCDataChannel(ExecutionContext*, RTCPeerConnection*, PassOwnPtr<WebRTCDataChannelHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDataChannel>*);
@@ -112,6 +116,8 @@
     RawPtrWillBeMember<ExecutionContext> m_executionContext;
 
     OwnPtr<WebRTCDataChannelHandler> m_handler;
+
+    bool m_stopped;
 
     WebRTCDataChannelHandlerClient::ReadyState m_readyState;
 
@@ -124,6 +130,8 @@
     Timer<RTCDataChannel> m_scheduledEventTimer;
     WillBeHeapVector<RefPtrWillBeMember<Event>> m_scheduledEvents;
 
+    WeakMember<RTCPeerConnection> m_connection;
+
     unsigned m_bufferedAmountLowThreshold;
 
     FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, BufferedAmountLow);