Alexandre Poirot
caec8eadf9
Avoid unregistering the JS Process actor ASAP on DevTools closing as it may throw many exception if any RDP Request or JSProcess Actor query is still pending after the devtools closing. It required some tweaks in the parent process as WatcherActor.conn may now be null because of shifted executions and we weren't correctly unregistering it because of lack of `connectionPrefix`. As well as some tweaks around `sharedData` to force persisting it across processes, otherwise the content process may still hold now destroyed watcher actor sessionData and keep instantiating actor. Last, but not least, because there is some shift in precise execution timings, I had to tweak docshell DOM event listeners as we may leave listeners on docshell's window object when the cleanup method is call after the docshell starts being destroyed and docshell.domWindow is already null. Differential Revision: https://phabricator.services.mozilla.com/D306953
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