Replace any uses of .send().unwrap() by .send().unwrap_or_else().
This is part of the effort to harden the constellation (#10124), in this case against panics caused by channel send.
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Update struct bindings to take alignment into account
This takes alignment into account on non-translatable types, so the only
failing tests now are:
```
bindgen_test_layout_StyleAnimation
bindgen_test_layout_nsStyleSVG
```
This includes:
36f18c9603
r? @bholley
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Reduce size of layout::fragment::Fragment struct
This reduces the size of the SpecificFragmentInfo enum from 48 to 24.
r? @pcwalton
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This takes alignment into account on non-translatable types, so the only
failing tests now are:
```
bindgen_test_layout_StyleAnimation
bindgen_test_layout_nsStyleSVG
```
This includes:
36f18c9603
ComputedValues is now ServoComputedValues
This is the first part of #10185. More to follow. I have built this locally with both servo and geckolib without errors; let's see if it succeeds on all platforms as well.
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layout: Only take nonnegative margins into account when estimating inline placement of floats.
Otherwise, the heuristics can pass even when there are no floats,
causing block formatting contexts to be speculated to be flowing around
floats that don't exist!
Closes#10237.
r? @mbrubeck
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Restore stripped whitespace before reflowing text fragments
Fixes#10200. r? @pcwalton
Note: The reftest uses a transition of non-zero duration, because I couldn't find any other way to reproduce the bug. Unfortunately this makes it unreliable in debug builds. I tried to fix this using reftest-wait with setTimeout and requestAnimationFrame, but it still wouldn't complete the animation consistently. To make the test work in debug builds we may need `transitionend` events (#10245) or a different way to reproduce the bug.
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Generate html and json of supported css properties.
Fixes#10196. Outputs html and json of supported css properties to `target/doc/` directory when deploying github-pages.
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