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Our previous idea to cut Rd for many reset cases cannot work if cr50 consistently resets the EC by asserting the reset pin shortly after power-on. Therefore, make a decision based upon whether battery-backed memory indicates we previously negotiated a PD power contract as a sink. If we previously did not negotiate a contract, or if power was removed from the device (causing battery-backed memory to wipe) then we can assume that we don't have an active power contract. BUG=chrome-os-partner:62952 BRANCH=reef TEST=On reef, run "cutoff" on the console, reattach AC, and verify device successfully wakes. Also verify Rp is dropped on console 'reboot' and F3 + power from RW. Change-Id: Ie300b9589cac6be7a69b77678bea6b1b6b25578c Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/443356 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>