Clean up to move NewStringCopy from util to chromoes/string.

src/common/chromeos/string.cc

Index: src/common/chromeos/string.cc
diff --git a/src/common/chromeos/string.cc b/src/common/chromeos/string.cc
index f447f85668d2f509212fa3b323bbcef793c0d179..c70e0656cca2cc4819c7cb40e6d8da9207036c1f 100644
--- a/src/common/chromeos/string.cc
+++ b/src/common/chromeos/string.cc
@@ -4,8 +4,9 @@
 
 #include <chromeos/string.h>
 
-#include <pcrecpp.h>
+#include <cstring>
 
+#include <pcrecpp.h>
 #include "base/logging.h"
 
 namespace chromeos {
@@ -45,5 +46,11 @@ void SplitStringUsing(const std::string& str,
   }
 }
 
+char* NewStringCopy(const char* x) {
+  char* result = static_cast<char*>(::operator new(std::strlen(x) + 1));
+  std::strcpy(result, x);  // NOLINT
+  return result;
+}
+
 }  // namespace chromeos