The Chrome Extensions code that was broken by this change the first time
it landed has been amended to deal appropriately with the ES2015
semantics in https://codereview.chromium.org/1864733002/.

BUG=v8:4602
LOG=y

Review URL: https://codereview.chromium.org/1857313003

Cr-Commit-Position: refs/heads/master@{#35279}