Revert "Revert "Remove guesswork for finding destination device""

This reverts commit 9ccd3689d828b31ebd3fe9356934074ca60bc75f.
Identical to commit f3636e13edcbe8e6f3e1622bc45ea57c9eb7a641

Either provided by --dst or already in the image in write_gpt.sh
script.
BUG=chromium:343182,chromium:340761,chromium:336654
TEST=Install on link, falco and peach
TEST= - recovery
TEST= - factory wipe/shell
TEST= - chromeinstall from USB key
TEST= - cros flash <machine>

CQ-DEPEND=CL:193424,CL:193425,CL:193428,CL:193429,CL:193449,CL:193451,CL:193452,CL:193453,CL:193454,CL:193455,CL:193470,CL:193471,CL:193473,CL:193474,CL:193490
Change-Id: Iccdf9946bd329d6e8d066b55a75d46cf7ddd34a4
Reviewed-on: https://chromium-review.googlesource.com/193426
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Commit-Queue: Puthikorn Voravootivat <puthik@chromium.org>
1 file changed