Add a missing include.



git-svn-id: http://google-url.googlecode.com/svn/trunk@177 8873c55e-713a-0410-88f8-23d9c3d90b1b
diff --git a/base/string16.cc b/base/string16.cc
index fc25809..eee3e77 100644
--- a/base/string16.cc
+++ b/base/string16.cc
@@ -28,6 +28,8 @@
 
 #include "base/string16.h"
 
+#include <string.h>
+
 #ifdef WIN32
 
 #error This file should not be used on 2-byte wchar_t systems