Use current global object in static method.

[otherdaniel]

Document.parseHTMLUnsafe is a static method and doesn't have a this. This fixes Document.parseHTMLUnsafe's algorithm to use the current global object, rather than this' relevant global object.

Fix: #11778

This is an editorial fix, so I'm not entirely sure the checklist below is meaningful. Still:

• At least two implementers are interested (and none opposed):
  • Already implemented in WebKit, Gecko, Blink.
• Tests are written and can be reviewed and commented upon at:
  • html/webappapis/dynamic-markup-insertion/html-unsafe-methods
• Implementation bugs are filed:
  • n/a. (The tests above couldn't pass if these implementations wouldn't already pick the current global object.)
• Corresponding HTML AAM & ARIA in HTML issues & PRs: n/a
• MDN issue is filed: n/a
• The top of this comment includes a clear commit message to use.

(See WHATWG Working Mode: Changes for more details.)

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/dynamic-markup-insertion.html ( diff )

[lukewarlow]

@annevk is this okay to be merged?

[zcorpan]

Is there a multi-globals test (examples) to check that "current global object" is the one that is used?

[annevk]

Yeah this looks okay to me. This matches what we do for static methods in Fetch.