X87: Remove obsolete functionality from the MacroAssemblers.

X87: Remove obsolete functionality from the MacroAssemblers.

port 64e3bad3677d01d70ddcedd541619216b973e90d (r30577)

original commit message:

    This is uncontroversial the dead code removal part of
    https://codereview.chromium.org/1307943013, which was
    previously landed, but got reverted because of DOM
    breakage that requires more investigation.

BUG=

Committed: https://crrev.com/0fce748dc62985298ad354f3e1af2446c376bc36
Cr-Commit-Position: refs/heads/master@{#30611}

[chunyang.dai, 2015-09-06 10:22:05]

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

[chunyang.dai, 2015-09-06 10:22:05]

PTAL

[Weiliang, 2015-09-07 07:18:34]

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

[Weiliang, 2015-09-07 07:18:35]

lgtm

[commit-bot: I haz the power, 2015-09-07 07:18:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1321653004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1321653004/1

[commit-bot: I haz the power, 2015-09-07 08:14:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-07 08:14:51]

Patchset 1 (id:??) landed as
https://crrev.com/0fce748dc62985298ad354f3e1af2446c376bc36
Cr-Commit-Position: refs/heads/master@{#30611}