MIPS: Minor cleanup in calling interceptors for loading properties.

Port r18054 (59d9d99)

BUG=

Review URL: https://codereview.chromium.org/84943008

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18065 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Generate TypedArrayInitialize builtin in hydrogen.

Port r18059 (b2849c3)

BUG=
R=dslomov@chromium.org, gergely@homejinni.com

Review URL: https://codereview.chromium.org/86053003

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18066 ce2b1a6d-e550-0410-aec6-3dcde31c8c00