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This should make it a little bit simpler for the somewhat common case
of a single column settings-box (20 / 60 existing two-line instances,
with more to come in internet settings).

BUG=589630
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2169193003
Cr-Commit-Position: refs/heads/master@{#407322}