[Fuchsia] Switch from 'new_parts' to 'parts' when generating GN.

TBR=kmarshall

Bug: 951021
Change-Id: I772b34af993ad37e7357de1e15852be487bf7d48
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1570479
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Auto-Submit: Wez <wez@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#651627}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: a5780b54439a7b5531a6a82baab121a4b019c0c5
1 file changed