Bug 1733109 - local copy 'handle' of the variable 'aPrincipalHandle' is never modified; consider avoiding the copy in HTMLMediaElement.cpp. r=alwu

Depends on D126942

Differential Revision: https://phabricator.services.mozilla.com/D126943

dom/html/HTMLMediaElement.cpp

@@ -6164,9 +6164,8 @@ void HTMLMediaElement::UpdateSrcStreamVideoPrincipal(
   nsTArray<RefPtr<VideoStreamTrack>> videoTracks;
   mSrcStream->GetVideoTracks(videoTracks);
 
-  PrincipalHandle handle(aPrincipalHandle);
   for (const RefPtr<VideoStreamTrack>& track : videoTracks) {
-    if (PrincipalHandleMatches(handle, track->GetPrincipal()) &&
+    if (PrincipalHandleMatches(aPrincipalHandle, track->GetPrincipal()) &&
         !track->Ended()) {
       // When the PrincipalHandle for the VideoFrameContainer changes to that of
       // a live track in mSrcStream we know that a removed track was displayed