Revert of Revert "Revert of [es6] Implement destructuring binding in try/catch"

Revert of Revert "Revert of [es6] Implement destructuring binding in try/catch" (patchset #2 id:20001 of https://codereview.chromium.org/1411323008/ )

Reason for revert:
[Sheriff] Breaks a layout test:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/2750

Please request rebase upstream first if intended.

Original issue's description:
> Revert "Revert of [es6] Implement destructuring binding in try/catch"
>
> Reland try/catch destructuring with a fix for the MemorySanitizer failure:
> initialization_pos needs to be initialized in the DeclarationDescriptor.
>
> This is a one line fix to http://crrev.com/a316db995e6e4253664920652ed4e5a38b2caeba
>
> BUG=v8:811
> LOG=y
>
> Committed: https://crrev.com/80a1e004f4ef619b54a2d87bf2108719a8411860
> Cr-Commit-Position: refs/heads/master@{#31834}

TBR=littledan@chromium.org,rossberg@chromium.org,adamk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:811
Committed: https://crrev.com/35a60c211e955f6c1b76a268ebb9317e6a6574af
Cr-Commit-Position: refs/heads/master@{#31840}

[Michael Achenbach, 2015-11-05 19:28:23]

Created Revert of Revert "Revert of [es6] Implement destructuring binding in
try/catch"

[commit-bot: I haz the power, 2015-11-05 19:28:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1421193006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1421193006/1

[commit-bot: I haz the power, 2015-11-05 19:28:44]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-05 19:29:19]

Patchset 1 (id:??) landed as
https://crrev.com/35a60c211e955f6c1b76a268ebb9317e6a6574af
Cr-Commit-Position: refs/heads/master@{#31840}