Non-SFI NaCl: Allow CLOCK_SYSTEM_TRACE on Chrome OS

base/time/time_posix.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/time/time.h"
 
 #include <stdint.h>
 #include <sys/time.h>
 #include <time.h>
 #if defined(OS_ANDROID) && !defined(__LP64__)
@@ skipping 303 matching lines @@
 #if (defined(_POSIX_THREAD_CPUTIME) && (_POSIX_THREAD_CPUTIME >= 0)) || \
     defined(OS_ANDROID)
   return ClockNow(CLOCK_THREAD_CPUTIME_ID);
 #else
   NOTREACHED();
   return TimeTicks();
 #endif
 }
 
 #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();
   }
 
   absolute_micro =
       (static_cast<int64>(ts.tv_sec) * Time::kMicrosecondsPerSecond) +
       (static_cast<int64>(ts.tv_nsec) / Time::kNanosecondsPerMicrosecond);
 
   return TimeTicks(absolute_micro);
 }
@@ skipping 36 matching lines @@
     result.tv_usec = static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1;
     return result;
   }
   int64 us = us_ - kTimeTToMicrosecondsOffset;
   result.tv_sec = us / Time::kMicrosecondsPerSecond;
   result.tv_usec = us % Time::kMicrosecondsPerSecond;
   return result;
 }
 
 }  // namespace base