Update chrome_rev
Update chrome_rev

This updates chrome_rev and dependent entries in DEPS.
This brings in some GN //build changes needed for Mac and Windows.

BUG= 512869, 545236
TEST= trybots
R=dschuff@chromium.org, bradnelson@chromium.org

Review URL: https://codereview.chromium.org/1427003013 .

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client