[es6] Fix return checking in derived constructors

[es6] Fix return checking in derived constructors

In a derived class constructor in case undefined is returned, we
should return the receiver. If the return is any other value type
we should throw a TypeError.

BUG=v8:4061
LOG=N
R=dslomov@chromium.org, adamk@chromium.org

Committed: https://crrev.com/baddc25eb2fa797649f92ba4a8fa7603ce38d49a
Cr-Commit-Position: refs/heads/master@{#28114}

[arv (Not doing code reviews), 2015-04-27 21:29:41]

cleanup

[arv (Not doing code reviews), 2015-04-27 21:29:54]

PTAL

[adamk, 2015-04-27 22:04:03]

Code lgtm, but it looks like you might have a real test failure.

[arv (Not doing code reviews), 2015-04-28 15:14:19]

Fix issue where the temp var was not declared in the right scope

[arv (Not doing code reviews), 2015-04-28 15:15:04]

Debug assert fixed.

Dmitry, can you take a look too?

[Dmitry Lomov (no reviews), 2015-04-28 16:05:48]

lgtm

[arv (Not doing code reviews), 2015-04-28 16:07:52]

The CQ bit was checked by arv@chromium.org

[arv (Not doing code reviews), 2015-04-28 16:07:52]

The patchset sent to the CQ was uploaded after l-g-t-m from adamk@chromium.org
Link to the patchset: https://codereview.chromium.org/1107203002/#ps40001
(title: "Fix issue where the temp var was not declared in the right scope")

[commit-bot: I haz the power, 2015-04-28 16:08:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1107203002/40001

[commit-bot: I haz the power, 2015-04-28 16:09:27]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-04-28 16:09:40]

Patchset 3 (id:??) landed as
https://crrev.com/baddc25eb2fa797649f92ba4a8fa7603ce38d49a
Cr-Commit-Position: refs/heads/master@{#28114}