From e10b8924aed50e2d885ae43f87304148cf628482 Mon Sep 17 00:00:00 2001
From: alwu <alwu@mozilla.com>
Date: Wed, 15 Mar 2023 17:26:33 +0000
Subject: [PATCH] Bug 1814314 - use the script runner for calling ProcessCues.
 r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D172606
---
 dom/html/TextTrackManager.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/dom/html/TextTrackManager.cpp b/dom/html/TextTrackManager.cpp
index 698271696282..02e44592f201 100644
--- a/dom/html/TextTrackManager.cpp
+++ b/dom/html/TextTrackManager.cpp
@@ -258,7 +258,8 @@ void TextTrackManager::UpdateCueDisplay() {
     return;
   }
 
-  nsPIDOMWindowInner* window = mMediaElement->OwnerDoc()->GetInnerWindow();
+  RefPtr<nsPIDOMWindowInner> window =
+      mMediaElement->OwnerDoc()->GetInnerWindow();
   if (!window) {
     WEBVTT_LOG("Abort UpdateCueDisplay, because of no window.");
   }
@@ -273,7 +274,14 @@ void TextTrackManager::UpdateCueDisplay() {
                      showingCues.Length(),
                      static_cast<void*>(showingCues.Elements()));
   nsCOMPtr<nsIContent> controls = videoFrame->GetVideoControls();
-  sParserWrapper->ProcessCues(window, jsCues, overlay, controls);
+
+  nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
+      "TextTrackManager::UpdateCueDisplay",
+      [window, jsCues, overlay, controls]() {
+        if (sParserWrapper) {
+          sParserWrapper->ProcessCues(window, jsCues, overlay, controls);
+        }
+      }));
 }
 
 void TextTrackManager::NotifyCueAdded(TextTrackCue& aCue) {