Revert of Always give class literals a block scope

Revert of Always give class literals a block scope (patchset #2 id:20001 of https://codereview.chromium.org/1413903002/ )

Reason for revert:
[Sheriff] Breaks vector stores:
http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20debug%20-%20vector%20stores/builds/536

Original issue's description:
> Always give class literals a block scope
>
> Class methods always have the class scope on their scope chain in order
> to implement strong mode checks. Previously, that scope wasn't attached
> to the ClassLiteral for anonymous classes (since the scope contained
> no bindings).
>
> This patch simply puts that same scope on the ClassLiteral, anonymous
> or not, which simplifies other code that needs to reason about the scope
> of a class and its methods.
>
> Committed: https://crrev.com/cf13dda1ba25e8293ea143f33c6c5f6233a39c86
> Cr-Commit-Position: refs/heads/master@{#31371}

TBR=mstarzinger@chromium.org,adamk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/8aec6fb0470dff7f110c54e22684a7907c82e2c7
Cr-Commit-Position: refs/heads/master@{#31373}

[Michael Achenbach, 2015-10-19 12:16:47]

Created Revert of Always give class literals a block scope

[Michael Achenbach, 2015-10-19 12:17:02]

machenbach@chromium.org changed reviewers:
+ mvstanton@chromium.org

[Michael Achenbach, 2015-10-19 12:17:02]

+ mvstanton

[Michael Achenbach, 2015-10-19 12:17:07]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-10-19 12:17:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1416583002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1416583002/1

[commit-bot: I haz the power, 2015-10-19 12:17:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-19 12:17:58]

Patchset 1 (id:??) landed as
https://crrev.com/8aec6fb0470dff7f110c54e22684a7907c82e2c7
Cr-Commit-Position: refs/heads/master@{#31373}