Previously, it counted the number of UTF-8 bytes when spacing out the
table, not the number of code points.

Bug: 808905
Change-Id: Ice5504089e0f7097e108c6dfbbb810620b9dfc94
Reviewed-on: https://chromium-review.googlesource.com/901142
Commit-Queue: Matt Giuca <mgiuca@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>