Move windows specific lock-recursion-counter into windows impl file...

Move windows specific lock-recursion-counter into windows impl file

Unix implementation of lock leaks the underlying lock_impl_ member
so that the condition variable implementation can directly acquire
and release the lock (without going through our abstract interface). This
causse the recursion counter to become incorrect on such platforms.

Windows uses an implementation of condition variables that uses our abstract
interface, and hence is the only implementation that can track the
recursion count (and besides... windows is the only platform that currently
allows recursive (multiple) acquisitions of a lock by a single thread.

I'll work on gracefully removing the depricated lock.cc
after I've landed this change.

r=cpu

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=3703

[cpu_(ooo_6.6-7.5), 2008-10-21 22:41:23]

LGTM

http://codereview.chromium.org/7660/diff/1/2
File base/lock.cc (right):

http://codereview.chromium.org/7660/diff/1/2#newcode7
Line 7: // Depricated file.  See lock_impl_*.cc for platform specific versions.
Deprecated?