Revert of Update re2

third_party/re2/util/test.cc

 // Copyright 2009 The RE2 Authors.  All Rights Reserved.
 // Use of this source code is governed by a BSD-style
 // 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"
 
 DEFINE_string(test_tmpdir, "/var/tmp", "temp directory");
 
 struct Test {
   void (*fn)(void);
   const char *name;
 };
 
 static Test tests[10000];
 static int ntests;
 
 void RegisterTest(void (*fn)(void), const char *name) {
   tests[ntests].fn = fn;
   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);
     tests[i].fn();
   }
   printf("PASS\n");
   return 0;
 }