PR_USEC_PER_MSEC   86 base/third_party/nspr/prtime.h #define PR_USEC_PER_MSEC	1000UL
PR_USEC_PER_MSEC   59 third_party/npapi/npspy/extern/nspr/prtime.h #define PR_USEC_PER_MSEC	1000UL