[win] Use std::atomic_thread_fence<> instead of _ReadWriteBarrier()

_ReadWriteBarrier() is deprecated, and <atomic> has been available for
a while now.

Ports part of https://chromium-review.googlesource.com/c/chromium/src/+/2365092
to v8.

No behavior change.

Bug: chromium:1255114
Change-Id: I9954193a69dad9396a5e9e7450066382de2fb172
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3204827
Auto-Submit: Nico Weber <thakis@chromium.org>
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77258}

src/base/platform/time.cc

@@ -24,6 +24,8 @@
 // This has to come after windows.h.
 #include <mmsystem.h>  // For timeGetTime().
 
+#include <atomic>
+
 #include "src/base/lazy-instance.h"
 #include "src/base/win32-headers.h"
 #endif
@@ -619,15 +621,10 @@ using TimeTicksNowFunction = decltype(&TimeTicks::Now);
 TimeTicksNowFunction g_time_ticks_now_function = &InitialTimeTicksNowFunction;
 int64_t g_qpc_ticks_per_second = 0;
 
-// As of January 2015, use of <atomic> is forbidden in Chromium code. This is
-// what std::atomic_thread_fence does on Windows on all Intel architectures when
-// the memory_order argument is anything but std::memory_order_seq_cst:
-#define ATOMIC_THREAD_FENCE(memory_order) _ReadWriteBarrier();
-
 TimeDelta QPCValueToTimeDelta(LONGLONG qpc_value) {
   // Ensure that the assignment to |g_qpc_ticks_per_second|, made in
   // InitializeNowFunctionPointer(), has happened by this point.
-  ATOMIC_THREAD_FENCE(memory_order_acquire);
+  std::atomic_thread_fence(std::memory_order_acquire);
 
   DCHECK_GT(g_qpc_ticks_per_second, 0);
 
@@ -682,7 +679,7 @@ void InitializeTimeTicksNowFunctionPointer() {
   // assignment to |g_qpc_ticks_per_second| happens before the function pointers
   // are changed.
   g_qpc_ticks_per_second = ticks_per_sec.QuadPart;
-  ATOMIC_THREAD_FENCE(memory_order_release);
+  std::atomic_thread_fence(std::memory_order_release);
   g_time_ticks_now_function = now_function;
 }
 
@@ -691,8 +688,6 @@ TimeTicks InitialTimeTicksNowFunction() {
   return g_time_ticks_now_function();
 }
 
-#undef ATOMIC_THREAD_FENCE
-
 }  // namespace
 
 // static