[turbofan] Eliminate redundant CheckString based on types.

[turbofan] Eliminate redundant CheckString based on types.

If the input to a CheckString is already a String, then the check
is redundant.

R=epertoso@chromium.org

Committed: https://crrev.com/f8ded1125f4c0b4492fcf9114bd6f1ea558033b2
Cr-Commit-Position: refs/heads/master@{#38118}

[Benedikt Meurer, 2016-07-28 03:27:51]

The CQ bit was checked by bmeurer@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-07-28 03:27:54]

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

[Benedikt Meurer, 2016-07-28 03:28:36]

Hey Enrico,

Here's a working version for CheckString.
Please take a look.

Thanks,
Benedikt

[commit-bot: I haz the power, 2016-07-28 03:56:11]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-28 03:56:12]

Dry run: This issue passed the CQ dry run.

[epertoso, 2016-07-28 08:03:05]

lgtm

[Benedikt Meurer, 2016-07-28 08:55:11]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-07-28 08:55:15]

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, 2016-07-28 08:56:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-28 08:58:26]

Description was changed from

==========
[turbofan] Eliminate redundant CheckString based on types.

If the input to a CheckString is already a String, then the check
is redundant.

R=epertoso@chromium.org
==========

to

==========
[turbofan] Eliminate redundant CheckString based on types.

If the input to a CheckString is already a String, then the check
is redundant.

R=epertoso@chromium.org

Committed: https://crrev.com/f8ded1125f4c0b4492fcf9114bd6f1ea558033b2
Cr-Commit-Position: refs/heads/master@{#38118}
==========

[commit-bot: I haz the power, 2016-07-28 08:58:27]

Patchset 1 (id:??) landed as
https://crrev.com/f8ded1125f4c0b4492fcf9114bd6f1ea558033b2
Cr-Commit-Position: refs/heads/master@{#38118}