Use correct function to get current time in CommandBufferDriver::ScheduleDelayedWork().
Use correct function to get current time in CommandBufferDriver::ScheduleDelayedWork().

This caused the DCHECK() in CommandBufferDriver::PollWork() to fail and crash.

BUG=NONE

Review-Url: https://codereview.chromium.org/1970163003
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#393308}

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