Delete deprecated properties zoom:reset and zoom:document.

BUG=664668,642613

Review-Url: https://codereview.chromium.org/2821843002
Cr-Commit-Position: refs/heads/master@{#467454}
(cherry picked from commit 36095a2996117ee0b77d0badc9b237ea4d686521)

Review-Url: https://codereview.chromium.org/2846783005 .
Cr-Commit-Position: refs/branch-heads/3071@{#277}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
6 files changed