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With these changes the strings become consistent with the bookmarks
bar context menu.

Bug: 757531
Change-Id: Ibba7856677f0bff6b29fc7d9fb98b9386a69e9d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2419377Reviewed-by: John Lee <johntlee@chromium.org>
Commit-Queue: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809968}