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This CL makes sure the list of ports visible in the serial port chooser
is ordered by file paths so that users can quickly jump to the desired
serial port.
It is especially useful when system has plenty of tty ports.

Screenshot: https://i.imgur.com/MoRcx5z.png

Bug: 884928
Change-Id: Ib0efe74eb2bd03263b7bf8e2fc6b8a719c839410
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2312316
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791456}