X87: fixed branch distances.

port r24151.

original commit message:

  Forgot a few kNear occurences, only happens with --deopt-every-n-times.
  Death to manual jump distance calculation! :-P

BUG=
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/595263002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24189 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
X87: Refactor bailout reasons and disable optimization in more cases.

port r24161.

original commit message:
  Refactor bailout reasons and disable optimization in more cases.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/597913002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24190 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'