Add missing system time in Mac ThreadTicks.

src/base/platform/time.cc

 // Copyright 2013 the V8 project 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 "src/base/platform/time.h"
 
 #if V8_OS_POSIX
 #include <fcntl.h>  // for O_RDONLY
 #include <sys/time.h>
 #include <unistd.h>
@@ skipping 23 matching lines @@
   mach_msg_type_number_t thread_info_count = THREAD_BASIC_INFO_COUNT;
   thread_basic_info_data_t thread_info_data;
   kern_return_t kr = thread_info(
       pthread_mach_thread_np(pthread_self()),
       THREAD_BASIC_INFO,
       reinterpret_cast<thread_info_t>(&thread_info_data),
       &thread_info_count);
   CHECK(kr == KERN_SUCCESS);
 
   v8::base::CheckedNumeric<int64_t> absolute_micros(
-      thread_info_data.user_time.seconds);
+      thread_info_data.user_time.seconds +
+      thread_info_data.system_time.seconds);
   absolute_micros *= v8::base::Time::kMicrosecondsPerSecond;
-  absolute_micros += thread_info_data.user_time.microseconds;
+  absolute_micros += (thread_info_data.user_time.microseconds +
+                      thread_info_data.system_time.microseconds);
   return absolute_micros.ValueOrDie();
 }
 #elif V8_OS_POSIX
 // Helper function to get results from clock_gettime() and convert to a
 // microsecond timebase. Minimum requirement is MONOTONIC_CLOCK to be supported
 // on the system. FreeBSD 6 has CLOCK_MONOTONIC but defines
 // _POSIX_MONOTONIC_CLOCK to -1.
 inline int64_t ClockNow(clockid_t clk_id) {
 #if (defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0) || \
   defined(V8_OS_BSD) || defined(V8_OS_ANDROID)
@@ skipping 565 matching lines @@
   defined(V8_OS_ANDROID)
   return ThreadTicks(ClockNow(CLOCK_THREAD_CPUTIME_ID));
 #else
   UNREACHABLE();
   return ThreadTicks();
 #endif
 }
 
 }  // namespace base
 }  // namespace v8