Ensure prototypes always stay fast by turning them fast again after an operation that turned them slow

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/439243005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22827 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Don't insert transitions between maps for prototypes.

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/437953004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22828 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
ARM64: fixed a couple of typos in TF

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/427713003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22829 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Also mark as prototype when passing in while creating a function.

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/422233010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22830 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/bleeding_edge' into bleeding_edge