From faf983e89a15b9d40e336ee32d5884521dbe6647 Mon Sep 17 00:00:00 2001
From: Sebastian Hengst <archaeopteryx@coole-files.de>
Date: Thu, 20 Oct 2016 20:03:16 +0200
Subject: [PATCH] Backed out changeset 443a94083e00 (bug 1294605)

---
 dom/html/HTMLMediaElement.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dom/html/HTMLMediaElement.cpp b/dom/html/HTMLMediaElement.cpp
index 538290a7a6d2..c3bcdd21715d 100644
--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -2210,11 +2210,15 @@ public:
                              nsString())
     , mCapturedTrackSource(aCapturedTrackSource)
   {
+    mCapturedTrackSource->RegisterSink(this);
   }
 
   void Destroy() override
   {
     MOZ_ASSERT(mCapturedTrackSource);
+    if (mCapturedTrackSource) {
+      mCapturedTrackSource->UnregisterSink(this);
+    }
   }
 
   MediaSourceEnum GetMediaSource() const override