Auto merge of #23637 - gterzian:continue-message-port, r=jdm

Continue message port

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Fixes #7457.
Fixes #12715.
Fixes #12717.
Fixes #16095.
Fixes #18969.

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components/script/dom/bindings/codegen/Bindings.conf

@@ -30,6 +30,10 @@ DOMInterfaces = {
     'weakReferenceable': True,
 },
 
+'MessagePort': {
+    'weakReferenceable': True,
+},
+
 #FIXME(jdm): This should be 'register': False, but then we don't generate enum types
 'TestBinding': {
     'inCompartments': ['PromiseAttribute', 'PromiseNativeHandler'],