Fix Win32Timer's Frequency init. This could cause some problems on the perf bots. Bug: angleproject:2908 Change-Id: If12e5939ba80b3fd0b9609e7b76df6045e60cb94 Reviewed-on: https://chromium-review.googlesource.com/c/1301849 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>