Clean up bits of PrintedDocument.

Change-Id: I75500b5732b6d7d4bd7bd8aad4de12646ea789c5
Reviewed-on: https://chromium-review.googlesource.com/1043253
Reviewed-by: Rebekah Potter <[email protected]>
Commit-Queue: Lei Zhang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#556129}
3 files changed