Fix the compilation issue for turbofan unsupported backend.

Fix the compilation issue for turbofan unsupported backend which
is introduced by https://chromium.googlesource.com/v8/v8/+/aed26c05a50b2a1257ef8accc67143825f2e1f60. 
( [turbofan] Clean up and factor out branch generation logic.)

BUG=

Committed: https://chromium.googlesource.com/v8/v8/+/0cd0231fbe234848bb6443c21e6a3cb470c0d36a

[chunyang.dai, 2014-11-21 02:37:55]

chunyang.dai@intel.com changed reviewers:
+ titzer@chromium.org

[chunyang.dai, 2014-11-21 02:38:53]

Hello, Titzer,

PTAL.

Thanks.

[titzer, 2014-11-21 08:53:34]

lgtm

[titzer, 2014-11-21 08:53:44]

The CQ bit was checked by titzer@chromium.org

[commit-bot: I haz the power, 2014-11-21 08:54:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/748673002/1

[commit-bot: I haz the power, 2014-11-21 09:22:39]

Committed patchset #1 (id:1)