stop writing isolate-* files

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/24072008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16837 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Turn HCompareHoleAndBranch into a HUnaryControlInstruction.

Port r16805 (b106027)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/23876029

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16838 ce2b1a6d-e550-0410-aec6-3dcde31c8c00