Removes support for using the system clock on ChromeOS

sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc

Index: sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
diff --git a/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc b/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
index 58ffb843a8717c9f659d95db465b0c56a9f3a3b3..1bbfb35bb9074a3b535f00871263b6e2d18b4afd 100644
--- a/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
+++ b/sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
@@ -303,10 +303,6 @@ ResultExpr RestrictClockID() {
   static_assert(4 == sizeof(clockid_t), "clockid_t is not 32bit");
   const Arg<clockid_t> clockid(0);
   return If(
-#if defined(OS_CHROMEOS)
-             // Allow the special clock for Chrome OS used by Chrome tracing.
-             clockid == base::TraceTicks::kClockSystemTrace ||
-#endif
                  clockid == CLOCK_MONOTONIC ||
                  clockid == CLOCK_MONOTONIC_COARSE ||
                  clockid == CLOCK_PROCESS_CPUTIME_ID ||