Non-SFI NaCl: Allow CLOCK_SYSTEM_TRACE on Chrome OS

base/time/time_posix.cc

Index: base/time/time_posix.cc
diff --git a/base/time/time_posix.cc b/base/time/time_posix.cc
index 6b08bb3bd2020d71c77f25c2c57db88afb8ed371..cdb640946a23233b095c8ea919f2f6fe22195109 100644
--- a/base/time/time_posix.cc
+++ b/base/time/time_posix.cc
@@ -321,17 +321,12 @@ TimeTicks TimeTicks::ThreadNow() {
 }
 
 #if defined(OS_CHROMEOS)
-// Force definition of the system trace clock; it is a chromeos-only api
-// at the moment and surfacing it in the right place requires mucking
-// with glibc et al.
-#define CLOCK_SYSTEM_TRACE 11
-
 // static
 TimeTicks TimeTicks::NowFromSystemTraceTime() {
   uint64_t absolute_micro;
 
   struct timespec ts;
-  if (clock_gettime(CLOCK_SYSTEM_TRACE, &ts) != 0) {
+  if (clock_gettime(kClockSystemTrace, &ts) != 0) {
     // NB: fall-back for a chrome os build running on linux
     return HighResNow();
   }