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Alexandre Poirot 72c00ac22e Bug 1593937 - Implement watchTargets for remote frames. r=jdescottes
* Introduce a new actor "Watcher", which might in the future allow listening to anything.
Here, it only implements listening for additional remote frame's WindowGlobal
and notify about the WindowGlobalTargetActor's.
* Also, very important part here is that it instantiates the BrowsingContextTargetActor much earlier. Before anything from the page is executed.
It requires to instantiate the actor directly from the content processes, whereas before, we were doing it from a frontend request, after a notification sent from the parent process to the frontend.
* Last but not least, make the TargetList use this new watcher actor in order to
notify the frontend about the dynamically added remote frames.

Differential Revision: https://phabricator.services.mozilla.com/D63317
2020-04-30 07:59:30 +00:00

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Sub document page</title>
</head>
<body>
Iframe document
</body>
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