From ab761be29cfd28b926fd5ff19bba82deba2a80f1 Mon Sep 17 00:00:00 2001
From: Alexandre Lissy <lissyx+mozillians@lissyx.dyndns.org>
Date: Thu, 27 Apr 2023 18:46:15 +0000
Subject: [PATCH] Bug 1826875 - Dispatch using correct thread on
 UtilityProcessManager missing r=ipc-reviewers,nika

Differential Revision: https://phabricator.services.mozilla.com/D176618
---
 ipc/glue/BackgroundParentImpl.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/ipc/glue/BackgroundParentImpl.cpp b/ipc/glue/BackgroundParentImpl.cpp
index 62f84f6a1fec..0ff8f54ce226 100644
--- a/ipc/glue/BackgroundParentImpl.cpp
+++ b/ipc/glue/BackgroundParentImpl.cpp
@@ -1389,8 +1389,13 @@ BackgroundParentImpl::RecvEnsureUtilityProcessAndCreateBridge(
             std::tuple<const nsresult&,
                        Endpoint<mozilla::PRemoteDecoderManagerChild>&&>;
         if (!upm) {
-          aResolver(Type(NS_ERROR_NOT_AVAILABLE,
-                         Endpoint<PRemoteDecoderManagerChild>()));
+          managerThread->Dispatch(NS_NewRunnableFunction(
+              "BackgroundParentImpl::RecvEnsureUtilityProcessAndCreateBridge::"
+              "Failure",
+              [aResolver]() {
+                aResolver(Type(NS_ERROR_NOT_AVAILABLE,
+                               Endpoint<PRemoteDecoderManagerChild>()));
+              }));
         } else {
           SandboxingKind sbKind = GetSandboxingKindFromLocation(aLocation);
           upm->StartProcessForRemoteMediaDecoding(otherPid, sbKind)
-- 
2.11.4.GIT