Invalidate OS-specific datetime cache on configuration change notification

src/platform.h

 // 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 175 matching lines @@
   // timestamp is used for determining if DST is in effect.
   static const char* LocalTimezone(double time);
 
   // Returns the local time offset in milliseconds east of UTC without
   // taking daylight savings time into account.
   static double LocalTimeOffset();
 
   // Returns the daylight savings offset for the given time.
   static double DaylightSavingsOffset(double time);
 
+  static void TimeZoneChanged();
+
   // Returns last OS error.
   static int GetLastError();
 
   static FILE* FOpen(const char* path, const char* mode);
   static bool Remove(const char* path);
 
   // Opens a temporary file, the file is auto removed on close.
   static FILE* OpenTemporaryFile();
 
   // Log file open mode is platform-dependent due to line ends issues.
@@ skipping 404 matching lines @@
   char name_[kMaxThreadNameLength];
   int stack_size_;
   Semaphore* start_semaphore_;
 
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_