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[Gecko Bug 1711479] Add the extended (two-value) font-size-adjust syntax to various WPT tests. #29253

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merged 2 commits into from Jun 14, 2021

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Differential Revision: https://phabricator.services.mozilla.com/D116280

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1711479
gecko-commit: 4e689776fe5d0c2450ee9f01ee6eeb6c1a608f65
gecko-reviewers: emilio

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The review process for this patch is being conducted in the Firefox project.

…ests.

Differential Revision: https://phabricator.services.mozilla.com/D116280

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1711479
gecko-commit: 46b6ee998a7ffd2b5d90257262afb125b5658f70
gecko-reviewers: emilio
…talled font lookup.

The test here used a face with `src: local(Arial);`, while the reference file used `font-family: Arial, sans-serif`;
but these may not reliably result in the same behavior. The `@font-face` rule looks up a specific *face*,
and if that face is not found, the test will fall back to the browser's default font; but the reference might
get a *different* result if, for example, a fontconfig alias/substitution rule is present that maps Arial to
a different sans-serif than the browser's default.

So instead of trying to use a local font lookup to provide the metrics contrast with Ahem, this patch specifically
loads a second font resource (in both the testcase and reference) to provide consistent behavior.

Differential Revision: https://phabricator.services.mozilla.com/D116452

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1711479
gecko-commit: 43c6edbfc3dac8013830c4737c051cfc00ae5968
gecko-reviewers: emilio
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