Added missing NavigatorId attributes
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Add the missing attributes from https://html.spec.whatwg.org/multipage/system-state.html#navigatorid
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Update to latest WebXR spec, add tests
This pulls in a bunch of the newer stuff. I think with this PR we're spec-compatible for the things we support.
<s>For testing I'm likely going to write custom tests rather than adapting the existing ones, as a first pass, but when I start adapting the existing ones these changes will make it smoother.</s>
This PR also adds some pretty simple tests that deal with core functionality.
r? @jdm @asajeffrey
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Fix already borrowed error in webdriver
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Split getter for mutation_observers() into two methods.
Please let me know if these API changes look good:
registered_mutation_observers() returns immutable references and does
not init mutation observers.
registered_mutation_observers_mut() lazily initializes raredata if it
does not exist.
Updated code that uses this methods to call appropriate method when
mutation is not necessary.
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Implement WheelEvent interface
Created a new dom interface: "WheelEvent" and added WPT tests to confirm the interface works. To do this I had to do the following:
- Create a new `WheelEvent` dom interface. It can be found in `script/dom/wheelevent.rs` and `dom/webidls/WheelEvent.webidl`
- Add a new `WheelEvent` option to the compositor's `CompositorEvent` enum
- Add a new `Wheel` option to the compositor's `WindowEvent` enum
- Add a new `WheelDelta` type to the `script_traits` module
- Modify the `scroll_event` logic. Now we send a `WheelEvent` before scrolling. Repeat: we send the WheelEvent notification BEFORE we send the scroll delta.
- Add two manual wpt tests to the `uievents/order-of-events` test collection
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The wheelevent sends a signal when a supported device is rotated in the
x, y, or z rotational dimensions. These tests only check whether this
signal is received for any rotation at all.
