Minor: remove extra PDF bug reference, fix a typo, one error check

Make the bug comment reference the crash bug, fix a typo tallPdf, and
no need to call checkIfNoErrorsOccured twice.

Bug: 891150
Change-Id: I40c1ce5ef82ebbb4f78e365310af3fa665ba7e6c
Reviewed-on: https://chromium-review.googlesource.com/c/1270195
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#597774}
2 files changed