X87: Move LiveEdit-related code.

port r21559 (dfd0cf8)

BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/303053002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21600 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
X87: Refactor CallICStub to use a different stub for each customization.

port r21564 (a39968c)

Original commit message:
This gives us much more room to customize on different functions, by
using MajorKey to differentiate them.

BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/307823003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21601 ce2b1a6d-e550-0410-aec6-3dcde31c8c00