Process css animations for gecko
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This is a PR for https://bugzilla.mozilla.org/show_bug.cgi?id=1341985 .
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- [ ] These changes fix #__ (github issue number if applicable).
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- [ ] There are tests for these changes OR
- [X] These changes do not require tests because it's for stylo
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Change the predefined type of flex-basis and make gecko glue auto-generate
Gecko [doesn't support](https://bugzilla.mozilla.org/show_bug.cgi?id=1105111) content value in flex-basis yet. We had to change the predefined type to `LengthOrPercentageOrAuto` in stylo build.
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- [X] These changes fix [Bug 1331529](https://bugzilla.mozilla.org/show_bug.cgi?id=1331529)
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We create the SequentialTask only if:
* We have no old computed values and we have animation name style in the new
computed values.
* Any animation properties is changed.
* display property is changed from 'none' and we have animation name style.
* display property is changed to 'none'.
In a subsequent patch we skip the SequentialTask if we have no running
animations and the display propery is changed to 'none'.
Stylo - gecko glue code for text-justify
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Implement gecko glue for text-justify property.
Gecko has supported text-justify in [Bug 276079](https://bugzilla.mozilla.org/show_bug.cgi?id=276079), and going to pref-on on Nightly very soon in [Bug 1343512](https://bugzilla.mozilla.org/show_bug.cgi?id=1343512). Let's make it work for stylo.
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Reject negative border radius
Replacerd Parse in parse_one_set_of_border_values with parse_non_negative and added tests for it
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Make text decoration testable and do not serialize initial text-decoration-style
Servo now uses the same name for the text-decoration-line longhand property as Gecko. This was done to enable testing of the text-decoration shorthand.
The text-decoration shorthand has been fixed to not serialize initial text-decoration-style.
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- [x ] These changes fix#15790
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- [x ] There are tests for these changes
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Assert that `domain_match` is operating on lowercase text
> (Note that both the domain string and the string will have been
> canonicalized to lower case at this point.)
Related to #15789
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Improve behaviour of image elements that perform multiple requests
This addresses cases where image elements end up making multiple requests, as well as makes the element respond to additional relevant mutations that trigger updating the image data.
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Deduplicate declarations on insertion, not at the end of parsing a block
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Remove unused content blocker code.
I don't know what it is for, so I believe it would be better to remove it
entirely until and unless we start using it.
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Servo side of gecko bug 1343078: update bindinggen bits for the changes I'm making to Gecko atoms.
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