Non-SFI NaCl: Allow CLOCK_SYSTEM_TRACE on Chrome OS

base/time/time.h

 // 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.
 
 // Time represents an absolute point in coordinated universal time (UTC),
 // internally represented as microseconds (s/1,000,000) since the Windows epoch
 // (1601-01-01 00:00:00 UTC) (See http://crbug.com/14734).  System-dependent
 // clock interface routines are defined in time_PLATFORM.cc.
 //
 // TimeDelta represents a duration of time, internally represented in
@@ skipping 558 matching lines @@
 }
 
 inline Time TimeDelta::operator+(Time t) const {
   return Time(t.us_ + delta_);
 }
 
 // TimeTicks ------------------------------------------------------------------
 
 class BASE_EXPORT TimeTicks {
  public:
+  // We define this even without OS_CHROMEOS for seccomp sandbox testing.
+#if defined(OS_LINUX)
+  // 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.
+  static const clockid_t kClockSystemTrace = 11;
+#endif
+
   TimeTicks() : ticks_(0) {
   }
 
   // Platform-dependent tick count representing "right now."
   // The resolution of this clock is ~1-15ms.  Resolution varies depending
   // on hardware/operating system configuration.
   static TimeTicks Now();
 
   // Returns a platform-dependent high-resolution tick count. Implementation
   // is hardware dependent and may or may not return sub-millisecond
@@ skipping 141 matching lines @@
 #endif
 };
 
 inline TimeTicks TimeDelta::operator+(TimeTicks t) const {
   return TimeTicks(t.ticks_ + delta_);
 }
 
 }  // namespace base
 
 #endif  // BASE_TIME_TIME_H_