ARM: Ensure space for lazy deoptimization before calling IC.

If IC triggers deoptimization, then subsequent patching might get invalid
target address that was overwritten.

R=verwaest@chromium.org
BUG=247688
TEST=mjsunit/regress/regress-247688.js

Review URL: https://chromiumcodereview.appspot.com/19972002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15808 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Prefill pre-allocated memory of folded allocation with one pointer fillers when heap verifier is on.

Port r15798 (3b92806)

BUG=

Review URL: https://codereview.chromium.org/19485006
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15809 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Add test case for issue 2793 about experimental natives.

R=yangguo@chromium.org
BUG=v8:2793

Review URL: https://codereview.chromium.org/19948002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15810 ce2b1a6d-e550-0410-aec6-3dcde31c8c00