Support default toJSON in WebIDL
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Ported related lines from gecko.
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Stylo: replace product={gecko,servo} with engine={gecko,servo-2013,servo-2020}
Renaming the variable helped make sure I looked at every use.
Also auto-generate relevant parts of `CSSStyleDeclaration.webidl`, to make libscript compile accordingly.
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ISSUE-21257: set redirectEnd on PerformanceResourceTiming
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Added the appropriate attribute and setters. Included a Timer struct with a `Drop` function to set this value to zero in error cases. Set the value to `responseEnd` on success. Eliminated tests that now pass.
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Implement PerformanceNavigation interface
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This is my first attempt. Please let me know if I should change anything.
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Add DOMMatrix.prototype.scaleNonUniform
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Implements `scaleNonUniform()` [per the spec](https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-scalenonuniform).
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Remove wpt tests for domainLookupStart
Set ResourceAttribute::DomainLookupTime
Move DomainLookupStart timing before HTTP request initialization
Change label of domainLookupStart TAO zero test to PASS
Adjust the from_resource_timing method to initialize domain_lookup_start value
Restore domainLookupsStart test
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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Note: The WheelEvent interface supports rotation in all 3 spatial
dimensions. This implementation only supports two due to limitations
in the Glutin compositor.
The wheelevent interface is a dom interface that triggers for any
attached device that can rotate in one or more spatial dimensions.
Traditionally this is the mouse wheel though other devices could be
used as well. E.g. the trackball on a trackball mouse.
