Stylo: replace product={gecko,servo} with engine={gecko,servo-2013,servo-2020}
Renaming the variable helped make sure I looked at every use.
Also auto-generate relevant parts of `CSSStyleDeclaration.webidl`, to make libscript compile accordingly.
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Use origin of final HTTP response as document origin
I discovered surprising problems when loading pages from http://joshmatthews.net that load same-origin images and try to use them as webgl textures. Since there's a redirect from joshmatthews.net to www.joshmatthews.net, the images are not considered same-origin in Servo because the document stores the origin for the original request's URL, rather than the origin of the response that is received after processing any redirections.
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WebXR sessions track draw texture
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Send the XR framebuffer texture to the XR session.
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Implement GetElementProperty wd command
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There are a few canvas2d-related dependencies that haven't updated, but they
only use euclid internally so that's not blocking landing the rest of the
changes.
Given the size of this patch, I think it's useful to get this landed as-is.
Implement Link and PartialLink text selectors for FindElement and related WebDriver commands
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Media fragment parser
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Media fragment parser for audio and video.
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Add a HOST_FILE env variable and fix the wdspec setup errors that it causes
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ISSUE-21257: set redirectEnd on PerformanceResourceTiming
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Added the appropriate attribute and setters. Included a Timer struct with a `Drop` function to set this value to zero in error cases. Set the value to `responseEnd` on success. Eliminated tests that now pass.
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Added framebuffer and related attributes to XRWebGLLayer
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Implement the `framebuffer` attribute of `XRWebGLLayer`.
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