Revert of Reland "LayoutDescriptor should inherit from JSTypedArray"

Revert of Reland "LayoutDescriptor should inherit from JSTypedArray" (patchset #3 id:40001 of https://codereview.chromium.org/1094333002/)

Reason for revert:
Breaks gbemu

Original issue's description:
> Reland "LayoutDescriptor should inherit from JSTypedArray"
>
> Original issue's description:
> > LayoutDescriptor should inherit from JSTypedArray
> >
> > It can't just inherit from a FixedTypedArray-like type, as we soon
> > assume that a FixedTypedArray-like type is always held by an
> > ArrayBufferView-like type
> >
> > BUG=v8:3996
> > R=ishell@chromium.org,verwaest@chromium.org
> > LOG=n
>
> BUG=v8:3996
> R=ishell@chromium.org,verwaest@chromium.org
> LOG=n

TBR=ishell@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3996
Committed: https://crrev.com/1692380f9374e1afdf506b52006cd3b1b7eb18aa
Cr-Commit-Position: refs/heads/master@{#27975}

[jochen (gone - plz use gerrit), 2015-04-21 15:58:03]

Created Revert of Reland "LayoutDescriptor should inherit from JSTypedArray"

[commit-bot: I haz the power, 2015-04-21 15:58:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1080403004/1

[commit-bot: I haz the power, 2015-04-21 15:58:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-22 04:10:28]

Patchset 1 (id:??) landed as
https://crrev.com/1692380f9374e1afdf506b52006cd3b1b7eb18aa
Cr-Commit-Position: refs/heads/master@{#27975}