Module metadata hook is missing

[jdm]

https://mixedreality.mozilla.org/area-demo-service-task/ fails immedidately with:

[2020-05-15T15:03:16Z ERROR script::dom::bindings::error] Error at https://mixedreality.mozilla.org/area-demo-service-task/arosg.js:3:20 Module metadata hook not set

This comes from https://searchfox.org/mozilla-central/rev/4166c15e2a99a23a9b38ad62c9fdfe8e5448b354/js/src/builtin/ModuleObject.cpp#1697, which is triggered by

servo/components/script/script_module.rs

Line 1066 in b9b569a

SetModuleMetadataHook(rt, None);

. We should port the equivalent code from Gecko instead.

[jdm]

@CYBAI You might be interested in this.

[CYBAI]

@jdm Thanks! I will look into it!