We cannot assume that the receiver is a JSObject, nor can we assume
ToObject() completes successfully.
TBR=yangguo@chromium.org
Bug: chromium:739954
Change-Id: Id55571131ef8755e86f15cd2acb918ff0f1b7788
Reviewed-on: https://chromium-review.googlesource.com/632376
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47611}