From a17fda2acb260b26a3b321e8440c1d85934ad490 Mon Sep 17 00:00:00 2001
From: Kartikaya Gupta <kgupta@mozilla.com>
Date: Mon, 30 Jul 2018 10:00:34 -0400
Subject: [PATCH] Bug 1479277 - Don't try to send APZ messages after teardown.
 r=botond

MozReview-Commit-ID: 8l0h197hfTj

--HG--
extra : rebase_source : a65b07f66a05b9ec54aa859fa0d9384061332120
---
 dom/ipc/TabChild.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dom/ipc/TabChild.cpp b/dom/ipc/TabChild.cpp
index 4442e783960f..67c06b2112ed 100644
--- a/dom/ipc/TabChild.cpp
+++ b/dom/ipc/TabChild.cpp
@@ -532,7 +532,7 @@ TabChild::DoUpdateZoomConstraints(const uint32_t& aPresShellId,
                                   const ViewID& aViewId,
                                   const Maybe<ZoomConstraints>& aConstraints)
 {
-  if (!mApzcTreeManager) {
+  if (!mApzcTreeManager || mDestroyed) {
     return false;
   }