[base] Use thread safe localtime_r() instead of localtime().

src/base/platform/platform-win32.cc

Index: src/base/platform/platform-win32.cc
diff --git a/src/base/platform/platform-win32.cc b/src/base/platform/platform-win32.cc
index d4c2a10bd697cab501f9db460606af22c730b30f..080e6bc0af9c6f631285adb810861e50fc2ce1ae 100644
--- a/src/base/platform/platform-win32.cc
+++ b/src/base/platform/platform-win32.cc
@@ -46,9 +46,8 @@ inline void MemoryBarrier() {
 
 
 int localtime_s(tm* out_tm, const time_t* time) {
-  tm* posix_local_time_struct = localtime(time);  // NOLINT
+  tm* posix_local_time_struct = localtime_r(time, out_tm);
   if (posix_local_time_struct == NULL) return 1;
-  *out_tm = *posix_local_time_struct;
   return 0;
 }