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This makes sure that the text is properly centered.

Before and after as shown in screenshot of crbug.com/933114

R=jacktfranklin@chromium.org

Bug: 1066415
Change-Id: I0565a680e7ca4486b1e85a6d03500a66b19e5c5a
Fixed: 933114
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2144097
Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757825}