Cherry-pick: Fix segfault reported by ClusterFuzz.

NOTE: this cherry-pick will only be landed after
https://googleplex-android-review.git.corp.google.com/#/c/523939/

BUG=401414

Review URL: https://codereview.chromium.org/448143002

Change-Id: I61470c53b66a5eeeadea7b8761a49687c572cc9d
git-svn-id: svn://svn.chromium.org/blink/trunk@179715 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed