Revert of [compiler] Load elimination now traverses CheckTaggedPointer.

Revert of [compiler] Load elimination now traverses CheckTaggedPointer. (patchset #1 id:1 of https://codereview.chromium.org/2104893002/ )

Reason for revert:
Clusterfuzz breakage (https://bugs.chromium.org/p/chromium/issues/detail?id=624756)

Original issue's description:
> [compiler] Load elimination now traverses CheckTaggedPointer.
>
> It also dereferences the inputs of StoreField, if those were
> CheckTaggedPointers. Tested manually.
>
> BUG=
>
> Committed: https://crrev.com/f416886358c0aeaa5b4d1e83d9c7d6bb8b0e7f2f
> Cr-Commit-Position: refs/heads/master@{#37330}

TBR=bmeurer@chromium.org,bgeron@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Committed: https://crrev.com/f496f80fa813b368348f0ca4d180a39839eb97f6
Cr-Commit-Position: refs/heads/master@{#37438}

[Jarin, 2016-06-30 11:46:37]

The CQ bit was checked by jarin@chromium.org

[Jarin, 2016-06-30 11:46:38]

Created Revert of [compiler] Load elimination now traverses CheckTaggedPointer.

[commit-bot: I haz the power, 2016-06-30 11:46:46]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-06-30 12:12:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-30 12:12:06]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-06-30 12:14:50]

Description was changed from

==========
Revert of [compiler] Load elimination now traverses CheckTaggedPointer.
(patchset #1 id:1 of https://codereview.chromium.org/2104893002/ )

Reason for revert:
Clusterfuzz breakage
(https://bugs.chromium.org/p/chromium/issues/detail?id=624756)

Original issue's description:
> [compiler] Load elimination now traverses CheckTaggedPointer.
> 
> It also dereferences the inputs of StoreField, if those were
> CheckTaggedPointers. Tested manually.
> 
> BUG=
> 
> Committed: https://crrev.com/f416886358c0aeaa5b4d1e83d9c7d6bb8b0e7f2f
> Cr-Commit-Position: refs/heads/master@{#37330}

TBR=bmeurer@chromium.org,bgeron@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=
==========

to

==========
Revert of [compiler] Load elimination now traverses CheckTaggedPointer.
(patchset #1 id:1 of https://codereview.chromium.org/2104893002/ )

Reason for revert:
Clusterfuzz breakage
(https://bugs.chromium.org/p/chromium/issues/detail?id=624756)

Original issue's description:
> [compiler] Load elimination now traverses CheckTaggedPointer.
>
> It also dereferences the inputs of StoreField, if those were
> CheckTaggedPointers. Tested manually.
>
> BUG=
>
> Committed: https://crrev.com/f416886358c0aeaa5b4d1e83d9c7d6bb8b0e7f2f
> Cr-Commit-Position: refs/heads/master@{#37330}

TBR=bmeurer@chromium.org,bgeron@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=

Committed: https://crrev.com/f496f80fa813b368348f0ca4d180a39839eb97f6
Cr-Commit-Position: refs/heads/master@{#37438}
==========

[commit-bot: I haz the power, 2016-06-30 12:14:51]

Patchset 1 (id:??) landed as
https://crrev.com/f496f80fa813b368348f0ca4d180a39839eb97f6
Cr-Commit-Position: refs/heads/master@{#37438}