This change mirrors the semantics for derived class constructors. This
change doesn't affect non class constructors.

This change could potentially break web compat. More details:
https://github.com/tc39/ecma262/pull/469

Bug=v8:5536

Change-Id: I519599949523733332d0b35e4f8d9ecb01cac495
Reviewed-on: https://chromium-review.googlesource.com/461225Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44594}