Revert of Update re2

third_party/re2/util/test.cc

Index: third_party/re2/util/test.cc
diff --git a/third_party/re2/util/test.cc b/third_party/re2/util/test.cc
index b0167e740a889dd81e88d43c64be3467c6a14ff9..2fe1bfa8c7900c8dfa5091ddfe4712288ee1bb12 100644
--- a/third_party/re2/util/test.cc
+++ b/third_party/re2/util/test.cc
@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 #include <stdio.h>
-#ifndef _WIN32
+#ifndef WIN32
 #include <sys/resource.h>
 #endif
 #include "util/test.h"
@@ -23,6 +23,18 @@
   tests[ntests++].name = name;
 }
 
+namespace re2 {
+int64 VirtualProcessSize() {
+#ifndef WIN32
+  struct rusage ru;
+  getrusage(RUSAGE_SELF, &ru);
+  return (int64)ru.ru_maxrss*1024;
+#else
+  return 0;
+#endif
+}
+}  // namespace re2
+
 int main(int argc, char **argv) {
   for (int i = 0; i < ntests; i++) {
     printf("%s\n", tests[i].name);