Moved type feedback vector to SharedFunctionInfo.

Type Vector followup: the type vector currently lives off the code object. This CL moves it to the SharedFunctionInfo, facilitating re-use and continued use in crankshafted code if desired.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/178463007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19712 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Track global cells as special side effects in GVN.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/188543004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19713 ce2b1a6d-e550-0410-aec6-3dcde31c8c00