MIPS: Support for DoubleToIStub (truncating).

Port r16322 (8a03070)

Original commit message:
Added support for truncating DoubleToIStub and reorganize the macro-assembler
dToI operations to do the fast-path inline and the slow path by calling the
stub.

BUG=
R=gergely@homejinni.com

Review URL: https://codereview.chromium.org/23694014

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16461 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
thread isolate in accessors.cc

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23824002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16462 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
remove Isolate::Current from most files starting with 'a'

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23859002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16463 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Move ToI conversions to the MacroAssembler

+ Replace DeferredTaggedToINoSSE2 by DoubleToIStub and a fpu version.

+ Prevent truncating TaggedToI from bailing out.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/22290005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16464 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove OptimizedCodeEntry *sigh*.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23584004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16465 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Prepare push to trunk.  Now working on version 3.21.9.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/23620015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16466 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
thread isolate in PreallocatedStorageAllocationPolicy

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23479015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16467 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
revert thread isolate in PreallocatedStorageAllocationPolicy

This reverts 16467 for breaking windows build

TBR=svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/23824005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16468 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Representation of interceptor / handler properties are tagged.
Otherwise store ICs will never be initialized, due to lookup->CanHoldValue(value);

BUG=chromium:256330
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23533012

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16471 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
In reporting step-in positions be more accurate with a position the debugger paused at

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/23264015

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16472 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Cleanup Semaphore class.

Drop the previous Semaphore class from platform files.

Add new Semaphore class using the new TimeDelta class for
the WaitFor() operation. Consistently assert correct behaviour
for the different implementations.

Improve test coverage of the Semaphore class.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/23748003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16473 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix Mac llvm-gcc42 build after commit r16473.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/23437020

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16474 ce2b1a6d-e550-0410-aec6-3dcde31c8c00