Cleanup some Windows TimeTicks functions.  Move TickTicks::Now and TicksTicks::UnreliableHighResNow to Singletons, which cleans up the code and removes some possible unsafe cross-thread access.

Move the Windows-specific rollover tests to time_unittests_win.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1633 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed