X87: Remove keyed_store_calling convention and friends

port r22706.

original commit message:
  Remove keyed_store_calling convention and friends

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/431263003

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22775 ce2b1a6d-e550-0410-aec6-3dcde31c8c00