Masayuki Nakano 23a18fdd2a Bug 831008 - Make `EventListenerManager` assert when a legacy DOM mutation event listener is added in either chrome documents, native anonymous subtrees or the system event groups r=smaug ... The legacy DOM mutation events shouldn't be used even in content and must not be used in chrome. This patch makes it crash if legacy mutation event listener is: * added to a node in a chrome document * added to a node in a native anonymous subtree * added to the system event group * implemented by C++ This causes some crash tests and chrome tests. Therefore, this patch modifies them to use `MutationObserver` instead or removes them if it's impossible to rewrite with `MutationObserver`. Note that if I prevent to dispatch mutation events in some/all of the cases, that causes performance regression in Speedometer3. Therefore, this patch does not touch `EventDispatcher`. Differential Revision: https://phabricator.services.mozilla.com/D181828		2023-06-27 04:20:17 +00:00
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layout-debug	Bug 1839518 - Convert LayoutDebugChild to an ES module. r=emilio	2023-06-21 09:49:06 +00:00
reftest	Bug 831008 - Make `EventListenerManager` assert when a legacy DOM mutation event listener is added in either chrome documents, native anonymous subtrees or the system event groups r=smaug	2023-06-27 04:20:17 +00:00