Merging to M42

Remove duplicate fonts from the font fallback list.

We use std::unique to remove duplicate entries from the fallback list.

BUG=467459
TBR=msw

Review URL: https://codereview.chromium.org/1019743004

Cr-Commit-Position: refs/heads/master@{#321497}
(cherry picked from commit 83de07b1894c61e53469c830c9f7c8986d9ae42c)

Review URL: https://codereview.chromium.org/1021353003

Cr-Commit-Position: refs/branch-heads/2311@{#298}
Cr-Branched-From: 09b7de5dd7254947cd4306de907274fa63373d48-refs/heads/master@{#317474}
1 file changed