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This patch adds a feature that, after 2000ms since navigation start,
all pending 'font-display: auto' web fonts will immediately enter the
failure display period. This prevents web fonts to become a source of
bad LCP or CLS.

Note: The value "2000ms" might need to be adjusted later for the best
results. See https://crbug.com/1065508 for more details.

Bug: 1065508
Change-Id: Ic04de331221057b019d37f421ed61050929caa0c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2133113
Commit-Queue: Xiaocheng Hu <xiaochengh@chromium.org>
Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757992}