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This change ensures fonts are sorted before being cached. This change is
due to a concern about fingerprinting:
https://github.com/w3ctag/design-reviews/issues/399#issuecomment-530679815

This change ensures that fonts are sorted in lexicographical order.

Bug: 1043306
Change-Id: Ia3acf2a45cb473124df4e489683bdc7bac15dde4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427040
Commit-Queue: Olivier Yiptong <oyiptong@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810519}