Automated commit: libchrome r1286879 uprev

Merge with upstream commit 9c1e93ac37f418549c1433987b2917fbd7e12ba4

BUG=None
TEST=sudo emerge libchrome

Change-Id: I8cb4d0a0faa1dfc8271d60382354960f2e436952
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/libchrome/+/5452117
Tested-by: Cici Ruan <cuicuiruan@google.com>
Commit-Queue: Cici Ruan <cuicuiruan@google.com>
Reviewed-by: Grace Cham <hscham@chromium.org>