tylerferrara: Modified FakeTime to allow advances in time.

JobBuild
373
07-28 23:28
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pull-cip-e2e 1420528594626547712 1420527154919116800 1420526604949393408
pull-cip-image-cip 1420528594689462272 1420527154986225664 1420526605075222528
pull-cip-unit-tests 1420528594723016704 1420527155019780096 1420526605108776960
pull-cip-verify 1420528594752376832 1420527155053334528 1420526605138137088
pull-cip-verify-archives 1420528594785931264 1420527155078500352 1420526605171691520