Auto merge of #22944 - ferjm:player.shutdown, r=ceyusa

Shutdown player when HTMLMediaElement is dropped

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #22931
- [X] There are tests for these changes

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/22944)
<!-- Reviewable:end -->

1 files changed, 2 insertions, 0 deletions

diff --git a/components/script/dom/mediadevices.rs b/components/script/dom/mediadevices.rs
index b89762c3779..808ce22c2af 100644
--- a/components/script/dom/mediadevices.rs
+++ b/components/script/dom/mediadevices.rs
@@ -17,6 +17,7 @@ use crate::dom::promise::Promise;
 use dom_struct::dom_struct;
 use servo_media::streams::capture::{Constrain, ConstrainRange, MediaTrackConstraintSet};
 use servo_media::ServoMedia;
+use servo_media_auto::Backend;
 use std::rc::Rc;
 
 #[dom_struct]
@@ -26,6 +27,7 @@ pub struct MediaDevices {
 
 impl MediaDevices {
     pub fn new_inherited() -> MediaDevices {
+        ServoMedia::init::<Backend>();
         MediaDevices {
             eventtarget: EventTarget::new_inherited(),
         }