Bug 1551836: Ensure that we clean up PeerConnectionMedia properly whe…

…n PeerConnectionImpl::Initialize fails. r=mjf

Differential Revision: https://phabricator.services.mozilla.com/D33071

media/webrtc/signaling/src/peerconnection/PeerConnectionImpl.cpp

@@ -371,6 +371,7 @@ PeerConnectionImpl::~PeerConnectionImpl() {
   // probably want to shut it down more aggressively to save memory.  We
   // could shut down here when there are no uses.  It might be more optimal
   // to release off a timer (and XPCOM Shutdown) to avoid churn
+  ShutdownMedia();
 }
 
 nsresult PeerConnectionImpl::Initialize(PeerConnectionObserver& aObserver,
@@ -469,27 +470,6 @@ nsresult PeerConnectionImpl::Initialize(PeerConnectionObserver& aObserver,
     return NS_ERROR_FAILURE;
   }
 
-  mMedia = new PeerConnectionMedia(this);
-
-  // Connect ICE slots.
-  mMedia->SignalIceGatheringStateChange.connect(
-      this, &PeerConnectionImpl::IceGatheringStateChange);
-  mMedia->SignalUpdateDefaultCandidate.connect(
-      this, &PeerConnectionImpl::UpdateDefaultCandidate);
-  mMedia->SignalIceConnectionStateChange.connect(
-      this, &PeerConnectionImpl::IceConnectionStateChange);
-
-  mMedia->SignalCandidate.connect(this, &PeerConnectionImpl::CandidateReady);
-
-  // Initialize the media object.
-  res = mMedia->Init();
-  if (NS_FAILED(res)) {
-    CSFLogError(LOGTAG, "%s: Couldn't initialize media object", __FUNCTION__);
-    return res;
-  }
-
-  PeerConnectionCtx::GetInstance()->mPeerConnections[mHandle] = this;
-
   mJsepSession =
       MakeUnique<JsepSessionImpl>(mName, MakeUnique<PCUuidGenerator>());
 
@@ -523,6 +503,27 @@ nsresult PeerConnectionImpl::Initialize(PeerConnectionObserver& aObserver,
     return res;
   }
 
+  mMedia = new PeerConnectionMedia(this);
+
+  // Initialize the media object.
+  res = mMedia->Init();
+  if (NS_FAILED(res)) {
+    CSFLogError(LOGTAG, "%s: Couldn't initialize media object", __FUNCTION__);
+    ShutdownMedia();
+    return res;
+  }
+
+  // Connect ICE slots.
+  mMedia->SignalIceGatheringStateChange.connect(
+      this, &PeerConnectionImpl::IceGatheringStateChange);
+  mMedia->SignalUpdateDefaultCandidate.connect(
+      this, &PeerConnectionImpl::UpdateDefaultCandidate);
+  mMedia->SignalIceConnectionStateChange.connect(
+      this, &PeerConnectionImpl::IceConnectionStateChange);
+  mMedia->SignalCandidate.connect(this, &PeerConnectionImpl::CandidateReady);
+
+  PeerConnectionCtx::GetInstance()->mPeerConnections[mHandle] = this;
+
   return NS_OK;
 }