From 03766e63da15d4eafc11f66b709f75734fe34a1d Mon Sep 17 00:00:00 2001
From: "Byron Campen [:bwc]" <docfaraday@gmail.com>
Date: Thu, 31 May 2018 11:30:19 -0500
Subject: [PATCH] Bug 1464079 - Bring ICE connection state change callback up
 to spec. r=jib, a=RyanVM

---
 dom/media/PeerConnection.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/dom/media/PeerConnection.js b/dom/media/PeerConnection.js
index d13f1d0fbb..0569b15aeb 100644
--- a/dom/media/PeerConnection.js
+++ b/dom/media/PeerConnection.js
@@ -516,6 +516,18 @@ RTCPeerConnection.prototype = {
     };
   },
 
+  // This implements the fairly common "Queue a task" logic
+  async _queueTaskWithClosedCheck(func) {
+    return new Promise(resolve => {
+      Services.tm.mainThread.dispatch({ run() {
+        if (!this._closed) {
+          func();
+          resolve();
+        }
+      }}, Ci.nsIThread.DISPATCH_NORMAL);
+    });
+  },
+
   /**
    * An RTCConfiguration may look like this:
    *