Update parse_length to match spec
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Add InRealm argument to Callback trait
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- [x] These changes fix#26007
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Drive-by refactoring of some unsafe code in stylo
Some stuff I found while thinking about other things between stylo and layout.
Third commit requires Gecko changes because I removed `From<u32>` for `FontLanguageOverride` and replaced it by the unsafe `FontLanguageOverride::from_u32` method.
Fix ServiceWorker in multiprocess
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FIX#15217FIX#26100
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There is no need to set the dirty descendants flag unsafely from the layout side
for elements with pending restyles, we can do that on the DOM side when draining
the restyles from the Document.
Check the BHM option before starting it in multi-process mode.
In multi-process mode, if the BHM option is set start with one otherwise don't.
I didn't add a test for this. However if I should I'd be happy to be pointed to where similar tests are done (meaning tests of options yielding the expected state) because I didn't find my way in all those tests.
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- [x] These changes fix#26088
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- [x] These changes do not require tests because they are minor enough to not require one.
Avoid infinitely looping CSS transitions.
This change addresses the long-standing issue of CSS transitions not ending appropriately. It does not fundamentally change the way we process transitions/animations.
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- [x] These changes fix#20379
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More layout cleanups from the introduction of a lifetime in LayoutDom<T>
What can I say, the follow-up fixes just kept coming to my door one by one, I couldn't just tell them to go away.
For clarity, I introduce <LayoutDom<Element>>::parent_node_ref to contain
the remaining unsafety bits out of composed_parent_node_ref which is more
complex than just a field access.
webgl: Don't dirty canvas element while in immersive mode.
There are various WebGL APIs that are supposed to trigger a frame composite at the end of the event loop when they're used. We enforce this via dirtying the canvas element and ensuring that reflow occurs for normal content. This is redundant when we're using immersive mode and incurs extra work by the layout thread and compositor that inhibits the immersive rendering performance.
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- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix (part of) #26019
- [x] These changes do not require tests because we do not have infrastructure to test immersive mode on CI.
