MIPS: Refactor only: Rename JSGlobaPropertyCell to PropertyCell

Port r15165 (daf37483)

BUG=

Review URL: https://codereview.chromium.org/17064007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15171 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Migrate BinaryOpICs and UnaryOpICs to new type rep

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/16957004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15172 ce2b1a6d-e550-0410-aec6-3dcde31c8c00