Deprecate old code aging mechanism.

The old code aging mechanism is too agressive with flushing as it leads
to many functions being flushed and recompiled over and over again. By
now the new code aging mechanism has stabilized enough to deprecate the
old fallback mechanism.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/17061004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15209 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Lower limit for external allocation and improve tracing.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/16896012

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15210 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Use type feedback for Array (non-constructor) call sites.

Port r15201 (8c56d50)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/17447004

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15211 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Fix cctest/test-assembler-mips on MIPS32R1 architecture.

TEST=cctest/test-assembler-mips/MIPS3

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/17099010

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15212 ce2b1a6d-e550-0410-aec6-3dcde31c8c00