MIPS: Only create arguments-maps in the bootstrapper, remove now obsolete ValueType flag.
MIPS: Only create arguments-maps in the bootstrapper, remove now obsolete ValueType flag.

Port r22245 (1471c64)

BUG=
R=palfia@homejinni.com

Review URL: https://codereview.chromium.org/375603002

git-svn-id: f98b9d40cb02301bc76fa9e1b46ee668158567fd@22253 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh