Copied from: https://hg.mozilla.org/releases/mozilla-esr38/rev/fc78180165a8
Security advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2016-01/
Mozilla Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1223670

# HG changeset patch
# User Karl Tomlinson <karlt+@karlt.net>
# Date 1449117514 -46800
# Node ID fc78180165a8262c80bbb722ed99b2e0c27b02d0
# Parent  925215cae26f9c0ccff07ef403a5b3194a4c45c4
bug 1223670 assert that connected streams have the same graph r=padenot a=abillings

diff --git a/dom/media/MediaStreamGraph.cpp b/dom/media/MediaStreamGraph.cpp
--- a/dom/media/MediaStreamGraph.cpp
+++ b/dom/media/MediaStreamGraph.cpp
@@ -2696,16 +2696,17 @@ ProcessedMediaStream::AllocateInputPort(
       unused << mPort.forget();
     }
     virtual void RunDuringShutdown()
     {
       Run();
     }
     nsRefPtr<MediaInputPort> mPort;
   };
+  MOZ_ASSERT(aStream->GraphImpl() == GraphImpl());
   nsRefPtr<MediaInputPort> port = new MediaInputPort(aStream, this, aFlags,
                                                      aInputNumber, aOutputNumber);
   port->SetGraphImpl(GraphImpl());
   GraphImpl()->AppendMessage(new Message(port));
   return port.forget();
 }
 
 void