mac: Implement the locking part of ScopedRlzValueStoreLock.

BUG=chromium:117738
TEST=none

Review URL: https://codereview.appspot.com/5874061

git-svn-id: http://rlz.googlecode.com/svn/trunk@115 10bc0f33-e4bf-9a86-80cf-af638054f0c4
2 files changed
tree: c66553c9a1f1f65b354626275f8310e2a1627462
  1. lib/
  2. mac/
  3. test/
  4. win/
  5. COPYING
  6. DEPS
  7. rlz.gyp