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