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We don't use files with the extension ".in" any more, as they have been
replaced with the more standard ".json5" format.

Change-Id: I54b8acf9d93b0711d54baf9685baaeeeeea8715c
Reviewed-on: https://chromium-review.googlesource.com/601769Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: meade_UTC10 <meade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491961}