Revert of Revert of [strong] Implement strong mode restrictions on property access

Revert of Revert of [strong] Implement strong mode restrictions on property access (patchset #1 id:1 of https://codereview.chromium.org/1189153002/)

Reason for revert:
Issue was ultimately caused/fixed by https://codereview.chromium.org/1194673002/

Original issue's description:
> Revert of [strong] Implement strong mode restrictions on property access (patchset #23 id:460001 of https://codereview.chromium.org/1168093002/)
>
> Reason for revert:
> Speculative revert, maybe breaks GC-stress
>
> http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/808
>
> Original issue's description:
> > [strong] Implement strong mode restrictions on property access
> >
> > Implements the strong mode proposal's restrictions on property access.
> >
> > To be fully explored in a followup: proxies, interceptors, access checks, load from super
> >
> > BUG=v8:3956
> > LOG=N
> >
> > Committed: https://crrev.com/85dbfb9a389e7b21bd2a63862202ee97fc5d7982
> > Cr-Commit-Position: refs/heads/master@{#29109}
>
> TBR=rossberg@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org,verwaest@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:3956
>
> Committed: https://crrev.com/407657b706711fd5f8d417841e24b284886f3776
> Cr-Commit-Position: refs/heads/master@{#29115}

TBR=rossberg@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3956
LOG=N

Committed: https://crrev.com/41405c0470d5b30ec5d22665ed9430c46b33624f
Cr-Commit-Position: refs/heads/master@{#29122}

[conradw, 2015-06-18 16:21:24]

Created Revert of Revert of [strong] Implement strong mode restrictions on
property access

[Toon Verwaest, 2015-06-18 17:01:34]

rubberstamp lgtm, commit away

[conradw, 2015-06-18 17:15:45]

The CQ bit was checked by conradw@chromium.org

[commit-bot: I haz the power, 2015-06-18 17:16:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1185343005/1

[commit-bot: I haz the power, 2015-06-18 17:16:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-18 17:17:20]

Patchset 1 (id:??) landed as
https://crrev.com/41405c0470d5b30ec5d22665ed9430c46b33624f
Cr-Commit-Position: refs/heads/master@{#29122}