remove Isolate::Current from most files starting with 's' through 'v'

remove Isolate::Current from most files starting with 's' through 'v'

R=svenpanne@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=16507

[Sven Panne, 2013-09-03 11:38:55]

LGTM with a nit

https://codereview.chromium.org/23549011/diff/1/src/serialize.h
File src/serialize.h (right):

https://codereview.chromium.org/23549011/diff/1/src/serialize.h#newcode477
src/serialize.h:477: Isolate* isolate() { return isolate_; }
const

https://codereview.chromium.org/23549011/diff/1/src/v8threads.cc
File src/v8threads.cc (right):

https://codereview.chromium.org/23549011/diff/1/src/v8threads.cc#newcode148
src/v8threads.cc:148: i::Isolate::Current(), every_n_ms);
Hmmm, we'll have to think about these: The Locker is constructed with a given
Isolate, and I'm currently not 100% sure if this is the same as Current(). But
this doesn't change the current behavior, so let's defer this...

[dcarney, 2013-09-03 11:54:28]

Committed patchset #1 manually as r16507 (presubmit successful).