MIPS: port all relevant commits since the new-gc was landed.

MIPS: port all relevant commits since the new-gc was landed.

This ports the following list of commits to mips. It is provided in this form
so that the mips port of the new-gc can be easily tested on your end.

This must be downloaded or landed after http://codereview.chromium.org/8106002
This is based on r9585. With these two mips commits, all tests are passing.

9319    Fix a harmless assert and a genuine bug in the GC-safety of stub generation ...
9329    ARM: Pregenerate some stubs that we call from other stubs.
9335    Initialize pre-allocated fields of JSObject with undefined.
9344    Put back the asserts in RememberedSetHelper, but correct this time
9370    Reorganize object type enum, such that proxies are no longer in the middle...
9392    Basic support for tracking smi-only arrays on ia32.
9402    Notify collector about lazily deoptimized code objects.
9411    Porting r9392 to arm (smi-only arrays).
9418    Small refactor to KeyedStoreIC::GenerateGeneric to make it slightly faster.
9447    Tighten up assertions checking GC-safety of stub calls.
9449    Record function call targets, use them for inlining.
9459    Make sure we don't flush the pregenerated stubs, since they need to b
9461    Fix the build on ARM
9466    Move the is_pregenerated flag so it does not overlap other flags....
9468    Fix the no-VFP3 build on ARM.
9475    Pass correct anchor_slot for EMBEDDED_OBJECT pointers from
9490    Adjust assertions in UpdateSlot to match UpdatePointer in PointersUpdatingVisitor.
9511    Clean list of external references from internal objects like the hole value.

9514    Simplify compares in KeyedStoreIC::GenerateGeneric.
9531    Porting r9456 to arm (Optimize KeyedStoreGeneric for Smi arrays).
9541    Fix load of potentially eval-shadowed let bindings.
9542    Fast allocation of block contexts.
9553    Activate smi-only optimizations for large array literals.

9575    Move declaration of SerializedScopeInfo from variables.h to objects.h
9577    Track elements_kind transitions in KeyedStoreICs.
9583    Fixing a bug in arm as pointed out in issue 1759.
9584    Refactor and fix polymorphic KeyedStoreIC creation.

BUG=
TEST=

Committed: http://code.google.com/p/v8/source/detail?r=9601

[Paul Lind, 2011-10-05 04:04:13]

Add a new mips port for r9511, "Clean list of external references from internal
objects like the hole value."

[Paul Lind, 2011-10-11 04:28:51]

Rebased to head of bleeding_edge (r9574) and added mips ports for 9514, 9531,
9541, 9542, and  9553.

[Paul Lind, 2011-10-12 04:25:57]

Rebased to r9585, and added mips ports for 9575, 9577, 9583, 9584.

[Paul Lind, 2011-10-13 07:00:02]

Danno, this change is rebased on your new work, and my updated patch for the gc.
Again, I combined everything, to let the GC code be easily testable. But this is
a whole lot of commits clubbed together, and is probably not very reviewable.

I'm fine with you taking this if you want, but if you prefer individual changes,
I can break them up and submit that way also. Just let me know you preference.

[danno, 2011-10-13 07:43:53]

lgtm, landing for you with fixed nits.