Bug 1004923 part 6 - Simplify PRMJ_Now as QueryPerformanceFrequency never fails on WinXP and newer. r=njn
Bug 1004923 part 7 - Kill unused calibration.last, returnedTime in PRMJ_Now. r=njn
Bug 1004923 part 8 - Add PRMJ_NowInit, call QueryPerformanceFrequency only once. r=njn
Bug 1004923 part 9 - Remove more cruft from prmjtime.cpp. r=njn
Bug 1004923 part 10 - Remove redundant calibration lock. r=njn