Move functions from handles.cc to where they belong.

R=mvstanton@chromium.org, ulan@chromium.org

Review URL: https://codereview.chromium.org/237673014

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20802 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Limit the lifetime of handles in Map::UpdateCodeCache.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/236313014

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20803 ce2b1a6d-e550-0410-aec6-3dcde31c8c00