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This CL adds horizontal alignment to the title and artist labels to
ensure that they stay properly aligned to the left. This fixes a bug
where overflowing text would shift slightly to the right.

Bug: 1021589
Change-Id: I7c007f4d7af4abe1556941b901a57569dcc41f30
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899089
Auto-Submit: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Jazz Xu <jazzhsu@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712663}