From 87558c3a17307df22f63aaa4af4a9fa1ab716d4a Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Tue, 15 Jan 2019 13:10:11 -0800
Subject: [PATCH] Shut down old VR compositor when the layer is replaced

---
 components/script/dom/vrdisplay.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/components/script/dom/vrdisplay.rs b/components/script/dom/vrdisplay.rs
index db474f967bb..99b082b703a 100644
--- a/components/script/dom/vrdisplay.rs
+++ b/components/script/dom/vrdisplay.rs
@@ -732,6 +732,12 @@ impl VRDisplay {
                                     .send_vr(WebVRCommand::Create(display_id))
                                     .unwrap();
                             }
+                            if let Some(ref api_sender) = api_sender {
+                                // shut down old vr compositor
+                                api_sender
+                                    .send_vr(WebVRCommand::Release(display_id))
+                                    .unwrap();
+                            }
                             context_id = update.context_id;
                         }