Reland "Fixed a couple of failing DCHECK(has_pending_exception()). (patchset #1 id:1 of https://codereview.chromium.org/1151373002/ )"

BUG=chromium:491062
LOG=N

Review URL: https://codereview.chromium.org/1157273002

Cr-Commit-Position: refs/heads/master@{#28699}