Revert of [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.

Revert of [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged. (patchset #2 id:20001 of https://codereview.chromium.org/2380543002/ )

Reason for revert:
Tanks ai-astar in Kraken pretty badly (some deopt loop).

Original issue's description:
> [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.
>
> Add a CanonicalizationMode to CodeStubAssembler::ChangeFloat64ToTagged,
> so clients can request Smi canonicalization when desired, but otherwise
> get Crankshaft/Fullcodegen compatible behavior of just boxing the double
> into a HeapNumber.
>
> R=verwaest@chromium.org
> BUG=v8:5268
>
> Committed: https://crrev.com/06eef6e6d8199df8317df8469d767092472f3fe0
> Cr-Commit-Position: refs/heads/master@{#39804}

TBR=verwaest@chromium.org,jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5268
Committed: https://crrev.com/55bd4f0572218b890c4fd36ece9dfd534d223d7f
Cr-Commit-Position: refs/heads/master@{#39812}

[Benedikt Meurer, 2016-09-28 09:03:33]

The CQ bit was checked by bmeurer@chromium.org

[Benedikt Meurer, 2016-09-28 09:03:33]

Created Revert of [stubs] Don't unconditionally canonicalize in
ChangeFloat64ToTagged.

[commit-bot: I haz the power, 2016-09-28 09:03:44]

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, 2016-09-28 09:03:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-28 09:04:12]

Description was changed from

==========
Revert of [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.
(patchset #2 id:20001 of https://codereview.chromium.org/2380543002/ )

Reason for revert:
Tanks ai-astar in Kraken pretty badly (some deopt loop).

Original issue's description:
> [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.
> 
> Add a CanonicalizationMode to CodeStubAssembler::ChangeFloat64ToTagged,
> so clients can request Smi canonicalization when desired, but otherwise
> get Crankshaft/Fullcodegen compatible behavior of just boxing the double
> into a HeapNumber.
> 
> R=verwaest@chromium.org
> BUG=v8:5268
> 
> Committed: https://crrev.com/06eef6e6d8199df8317df8469d767092472f3fe0
> Cr-Commit-Position: refs/heads/master@{#39804}

TBR=verwaest@chromium.org,jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5268
==========

to

==========
Revert of [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.
(patchset #2 id:20001 of https://codereview.chromium.org/2380543002/ )

Reason for revert:
Tanks ai-astar in Kraken pretty badly (some deopt loop).

Original issue's description:
> [stubs] Don't unconditionally canonicalize in ChangeFloat64ToTagged.
>
> Add a CanonicalizationMode to CodeStubAssembler::ChangeFloat64ToTagged,
> so clients can request Smi canonicalization when desired, but otherwise
> get Crankshaft/Fullcodegen compatible behavior of just boxing the double
> into a HeapNumber.
>
> R=verwaest@chromium.org
> BUG=v8:5268
>
> Committed: https://crrev.com/06eef6e6d8199df8317df8469d767092472f3fe0
> Cr-Commit-Position: refs/heads/master@{#39804}

TBR=verwaest@chromium.org,jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5268

Committed: https://crrev.com/55bd4f0572218b890c4fd36ece9dfd534d223d7f
Cr-Commit-Position: refs/heads/master@{#39812}
==========

[commit-bot: I haz the power, 2016-09-28 09:04:13]

Patchset 1 (id:??) landed as
https://crrev.com/55bd4f0572218b890c4fd36ece9dfd534d223d7f
Cr-Commit-Position: refs/heads/master@{#39812}