X87: Skip the mapcheck on the global object since the global proxy and cell are already checked

X87: Skip the mapcheck on the global object since the global proxy and cell are already checked

port 6af7ca6be4cd768b3326f0b8c32d4fbc3baa20c8 (r26886)

original commit message:

  Skip the mapcheck on the global object since the global proxy and cell are already
  checked (or the global object map for contextual global loads).

BUG=

Committed: https://crrev.com/235bf89c876addd8f4c0a782b695ca9e79948837
Cr-Commit-Position: refs/heads/master@{#26908}

[chunyang.dai, 2015-02-27 07:48:56]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-02-27 07:48:56]

PTAL.

[Weiliang, 2015-02-27 07:49:21]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-02-27 07:49:21]

lgtm

[commit-bot: I haz the power, 2015-02-27 07:50:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/965693002/1

[commit-bot: I haz the power, 2015-02-27 08:09:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-27 08:09:28]

Patchset 1 (id:??) landed as
https://crrev.com/235bf89c876addd8f4c0a782b695ca9e79948837
Cr-Commit-Position: refs/heads/master@{#26908}