Thread the status through navigation redirects
This is necessary because status codes affect whether the redirect is done with the same HTTP method or a different one.
This is part of #21886, but there's also a flaw in how iframes are handled that is causing the redirect to take over the entire window, so this commit doesn't entirely fix slither.io.
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Update document.open to latest spec
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This is one of my first contributions, so I might need some direction cleaning it up -- I ran web-platform-tests locally, but the suite has several intermittent passes/failures for me. Thanks!
Few notes:
* I may have been wrong to eliminate all of the resets listed in what was formerly Step 18 (starts with `self.implementation.set(None);`). It's not clear to me that they're still needed or if so, what step they would fall under, but I didn't notice any web platform tests break as a result.
* <s>If I'm reading the spec right, there's a discrepancy in the error returned by the three-parameter overload of Document.open between the spec and web-platform-tests/implementations in other browsers. As written, I favored the spec, but it causes one web-platform-test to fail.</s> This has been resolved in https://github.com/whatwg/html/pull/4066
* I'm not 100% certain that tests pass as expected, I had several intermittent failures that disappeared when re-run.
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style: Some animation cleanups and fixes.
The transitions code is still terribly broken, but I ran out of time fixing it. We have nothing that stops transitions, which is just plain wrong. Most of this code should probably be rewritten, since with the current setup is pretty hard to get it right. Anyway...
Fixes#20731.
Fixes#20116.
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Make layout use available image data before querying the image cache.
These changes make layout more efficient for any page which contains images that have already loaded, since it does not require synchronously querying the image cache thread for each image present. It also makes reloading a page actually display the images that are already in the image cache.
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Update Webrender
New version is
9156a4465f6ad715a0206cdd9a7e9a6f0385fbd6
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Remove the HTMLTable{Header,Data}CellElement interfaces
Fixes#17222.
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This removes the `HTMLTableHeaderCellElement` and `HTMLTableDataCellElement` interfaces and uses the `HTMLTableCellElement` interface for both `th` and `td` elements, as per the spec.
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Add <audio> and <video> player backends
These patches enables audio and video playing inside Servo.
It is bit hackish way to enable it, thus the purpose of this pull request is for an early request for comments.
It is tested with the current servo-media GStreamer backend in Linux.
~~The produced layout is not correct, since the elements after the video seems to be stacked behind, and the same with the scrolling bars.~~
~~There is no JavaScript interface yet~~, neither controls.
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