Update re2

third_party/re2/re2/onepass.cc

Index: third_party/re2/re2/onepass.cc
diff --git a/third_party/re2/re2/onepass.cc b/third_party/re2/re2/onepass.cc
index 1c4998828b500a86ad7eceac27a1cd94d3e90de4..73acdc8d4e58337c7743fae5ad9dac77f65cee28 100644
--- a/third_party/re2/re2/onepass.cc
+++ b/third_party/re2/re2/onepass.cc
@@ -53,7 +53,6 @@
 #include <string.h>
 #include <map>
 #include "util/util.h"
-#include "util/arena.h"
 #include "util/sparse_set.h"
 #include "re2/prog.h"
 #include "re2/stringpiece.h"
@@ -126,9 +125,6 @@ static const int Debug = 0;
 // whether a set of conditions required to finish a match at that
 // point in the input rather than process the next byte.
 
-// A state in the one-pass NFA (aka DFA) - just an array of actions.
-struct OneState;
-
 // A state in the one-pass NFA - just an array of actions indexed
 // by the bytemap_[] of the next input byte.  (The bytemap
 // maps next input bytes into equivalence classes, to reduce
@@ -335,7 +331,8 @@ done:
   if (!matched)
     return false;
   for (int i = 0; i < nmatch; i++)
-    match[i].set(matchcap[2*i], matchcap[2*i+1] - matchcap[2*i]);
+    match[i].set(matchcap[2*i],
+                 static_cast<int>(matchcap[2*i+1] - matchcap[2*i]));
   return true;
 }