Update re2

third_party/re2/util/thread.h

Index: third_party/re2/util/thread.h
diff --git a/third_party/re2/util/thread.h b/third_party/re2/util/thread.h
index b9610e045895de51dfa9186da3293e26401ad89d..fb67bdc6de629350a3f95e3f70390167be821bbc 100644
--- a/third_party/re2/util/thread.h
+++ b/third_party/re2/util/thread.h
@@ -5,7 +5,11 @@
 #ifndef RE2_UTIL_THREAD_H__
 #define RE2_UTIL_THREAD_H__
 
+#ifdef _WIN32
+#include <windows.h>
+#else
 #include <pthread.h>
+#endif
 
 class Thread {
  public:
@@ -15,12 +19,15 @@ class Thread {
   void Join();
   void SetJoinable(bool);
   virtual void Run() = 0;
- 
+
  private:
+#ifdef _WIN32
+  HANDLE pid_;
+#else
   pthread_t pid_;
+#endif
   bool running_;
   bool joinable_;
 };
 
 #endif  // RE2_UTIL_THREAD_H__
-