Fix a race in initialization of timezone cache in platform-win32.

src/platform-posix.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 336 matching lines @@
   *usecs = usage.ru_utime.tv_usec;
   return 0;
 }
 
 
 double OS::TimeCurrentMillis() {
   return Time::Now().ToJsTime();
 }
 
 
-double OS::DaylightSavingsOffset(double time) {
+class TimezoneCache {};
+
+
+TimezoneCache* OS::CreateTimezoneCache() {
+  return NULL;
+}
+
+
+void OS::DisposeTimezoneCache(TimezoneCache* cache) {
+  ASSERT(cache == NULL);
+}
+
+
+void OS::ClearTimezoneCache(TimezoneCache* cache) {
+  ASSERT(cache == NULL);
+}
+
+
+double OS::DaylightSavingsOffset(double time, TimezoneCache*) {
   if (std::isnan(time)) return nan_value();
   time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
   struct tm* t = localtime(&tv);
   if (NULL == t) return nan_value();
   return t->tm_isdst > 0 ? 3600 * msPerSecond : 0;
 }
 
 
-void OS::TimeZoneChanged() {}
-
-
 int OS::GetLastError() {
   return errno;
 }
 
 
 // ----------------------------------------------------------------------------
 // POSIX stdio support.
 //
 
 FILE* OS::FOpen(const char* path, const char* mode) {
@@ skipping 402 matching lines @@
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = LocalKeyToPthreadKey(key);
   int result = pthread_setspecific(pthread_key, value);
   ASSERT_EQ(0, result);
   USE(result);
 }
 
 
 } }  // namespace v8::internal