Revert 230968 "Use HighResNow whenever possible on Windows."

Speculative revert. Appears to be causing problems on webgl gpu bots
(unsure of root cause), and possible some XP test bots (TimeTicks::Now
non-monotonic).

TBR=awong@chromium.org, kbr@chromium.org, simonjam@chromium.org

BUG=311646

> Use HighResNow whenever possible on Windows.
> 
> This has been enabled on Canary channel for sometime now and seems to be
> safe there. We also now have data from stable channel showing there are
> no unexpectedly buggy CPUs out there. This should be safe to turn on for
> all users with adequate CPUs, which is the majority of them.
> 
> BUG=158234
> 
> Review URL: https://codereview.chromium.org/41953002

TBR=simonjam@chromium.org

Review URL: https://codereview.chromium.org/45783003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@231152 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed