[arm] CheckConstPool between TurboFan instructions.

[arm] CheckConstPool between TurboFan instructions.

Some TurboFan instructions block the literal pool for their entire
duration. If a long enough sequence of these instructions is
encountered, the literal pool can be blocked until it goes out of range.

Patch from issue 1236603002 at patchset 1 (http://crrev.com/1236603002#ps1).

BUG=v8:4292
LOG=y
R=jarin@chromium.org

Committed: https://crrev.com/3c9c7748c386d967762116de53e31dd1d24f8627
Cr-Commit-Position: refs/heads/master@{#29587}

[Jarin, 2015-07-13 05:05:27]

lgtm

[Benedikt Meurer, 2015-07-13 05:05:35]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-07-13 05:05:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1232343002/1

[commit-bot: I haz the power, 2015-07-13 05:26:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-13 05:26:55]

Patchset 1 (id:??) landed as
https://crrev.com/3c9c7748c386d967762116de53e31dd1d24f8627
Cr-Commit-Position: refs/heads/master@{#29587}