Move abstract parser infrastructure from servohtmlparser.rs to parse

[broesamle]

Fixes #10856

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This change is

[highfive]

Thanks for the pull request, and welcome! The Servo team is excited to review your changes, and you should hear from @glennw (or someone else) soon.

[highfive]

Heads up! This PR modifies the following files:

• @KiChjang: components/script/parse/mod.rs, components/script/dom/document.rs, components/script/dom/servohtmlparser.rs, components/script/dom/servoxmlparser.rs, components/script/script_thread.rs

[highfive]

Warning

• These commits modify unsafe code. Please review it carefully!
• These commits modify script code, but no tests are modified. Please consider adding a test!

[Ms2ger]

This looks great! All I can find to complain about is a few whitespace nits, so I'll do that :)

-S-awaiting-review +S-needs-code-changes

r? @Ms2ger

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Reviewed 5 of 5 files at r1.
Review status: all files reviewed at latest revision, 6 unresolved discussions.

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components/script/dom/servohtmlparser.rs, line 39 [r1] (raw file):
Revert those two new empty lines, please.

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components/script/dom/servohtmlparser.rs, line 55 [r1] (raw file):
There's now three empty lines below this; one should be enough.

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components/script/parse/mod.rs, line 5 [r1] (raw file):
Just one empty line between license and imports.

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components/script/parse/mod.rs, line 25 [r1] (raw file):
And just one here...

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components/script/parse/mod.rs, line 49 [r1] (raw file):
And here

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components/script/parse/mod.rs, line 180 [r1] (raw file):
And no empty line at the end here.

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Comments from Reviewable

[broesamle]

removed double empty lines.
hope I found all.

[Ms2ger]

Thanks! just needs a squash now; let me know if you need help with that.

-S-awaiting-review +S-needs-squash

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Reviewed 2 of 2 files at r2.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[broesamle]

the idea is to make one commit out of it... like the second last point in the git workflow?

$ git rebase -i --autosquash <mozilla>/master

[Ms2ger]

Yep.

[broesamle]

done.

[Ms2ger]

@bors-servo r+

Thanks!

[bors-servo]

📌 Commit 7c4489b has been approved by Ms2ger

[bors-servo]

⌛ Testing commit 7c4489b with merge 5fd93de...

[bors-servo]

☀️ Test successful - android, arm32, arm64, linux-dev, linux-rel, mac-dev-unit, mac-rel-css, mac-rel-wpt