Renaming language detection feature flag function to be grammatically sensible.

R=aboxhall

Bug: 889370
Change-Id: Ib4c28c3fd7df0e9e2423708abff8a93ba70a0626
Reviewed-on: https://chromium-review.googlesource.com/c/1496400
Commit-Queue: Chris Hall <chrishall@chromium.org>
Commit-Queue: Alice Boxhall <aboxhall@chromium.org>
Auto-Submit: Chris Hall <chrishall@chromium.org>
Reviewed-by: Alice Boxhall <aboxhall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636719}
3 files changed