update mouse position when receiving mouse wheel events
Rebase of #14808.
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A test case change is added to #13442: Fix #12193 Servo displays upper level Thai character in wrong place.
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Create KeyframeAnimation for empty keyframe rules
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We should create KeyframeAnimation even if css keyframe rule is empty because we should fire css animation events for such CSS animations.
Also we should ignore properties that are annotated with '!important'. From the spec[1].
using !important on them is invalid and will cause the property to be ignored
[1] https://drafts.csswg.org/css-animations-1/#keyframes
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We need to create CSS animations that have empty keyframe or keyframes
which have only invalid properties or non-animatable properties to fire
animation events for such animations.
Update to webdriver v0.20.0
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- [x] These changes do not require tests because _Servo is not sufficiently mature to run WPT WebDriver tests_
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Fixed mach/servo logger choice for single files
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Fixed mach/servo logger choice for single files as per @jdm’s [suggestion](https://github.com/servo/servo/issues/15193#issuecomment-275586263).
It’s also possible to do this by checking if the `test_list` path is a directory. This might be trying to make an implementation that is “too smart” though, so I stuck with checking the file extension against `[.html, .htm, .js, .xhtml]` as per the suggestion.
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Styling was correct because of the explicit dirtiness, but still not fun.
Some things, like dynamic updates to with things like [style~="color"] ~ foo
selectors, were pretty broken, because we didn't take snapshots of those
attributes.
Remove unused builders
These have been superseded by the windows-gnu and windows-msvc versions.
Removing them allows freeing up disk space on the Windows builders.
r? @larsbergstrom
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