Revert "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 3037c98bd897779d64b78d630e750d5a539b0f1a..6b08bb3bd2020d71c77f25c2c57db88afb8ed371 100644
--- a/base/time/time_posix.cc
+++ b/base/time/time_posix.cc
@@ -320,19 +320,18 @@ TimeTicks TimeTicks::ThreadNow() {
 #endif
 }
 
-// NaCl IRT does not support the Chrome OS specific clock
-// ID. build/common.gypi sets OS_CHROMEOS without any other OS_*
-// macros for untrusted NaCl build so we need to check
-// __native_client__ explicitly.
-// TODO(hamaji): Do not specify OS_CHROMEOS for untrusted NaCl build
-// and remove !defined(__native_client__).
-#if defined(OS_CHROMEOS) && !defined(__native_client__)
+#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(kClockSystemTrace, &ts) != 0) {
+  if (clock_gettime(CLOCK_SYSTEM_TRACE, &ts) != 0) {
     // NB: fall-back for a chrome os build running on linux
     return HighResNow();
   }
@@ -344,14 +343,14 @@ TimeTicks TimeTicks::NowFromSystemTraceTime() {
   return TimeTicks(absolute_micro);
 }
 
-#else // !(defined(OS_CHROMEOS) && !defined(__native_client__))
+#else // !defined(OS_CHROMEOS)
 
 // static
 TimeTicks TimeTicks::NowFromSystemTraceTime() {
   return HighResNow();
 }
 
-#endif // defined(OS_CHROMEOS) && !defined(__native_client__)
+#endif // defined(OS_CHROMEOS)
 
 #endif  // !OS_MACOSX