Replace wstring with string16 in sandbox

sandbox/win/src/sandbox_utils.h

Index: sandbox/win/src/sandbox_utils.h
diff --git a/sandbox/win/src/sandbox_utils.h b/sandbox/win/src/sandbox_utils.h
index 9a906754f1e0a58236096b4bff5e42e3776ca2c5..3043597b1858c1893f519e78ff2221472af0bca2 100644
--- a/sandbox/win/src/sandbox_utils.h
+++ b/sandbox/win/src/sandbox_utils.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/strings/string16.h"
 #include "sandbox/win/src/nt_internals.h"
 
 namespace sandbox {
@@ -16,7 +17,7 @@ namespace sandbox {
 // Returns true if the current OS is Windows XP SP2 or later.
 bool IsXPSP2OrLater();
 
-void InitObjectAttribs(const std::wstring& name,
+void InitObjectAttribs(const base::string16& name,
                        ULONG attributes,
                        HANDLE root,
                        OBJECT_ATTRIBUTES* obj_attr,