importer: Convert NSSDecryptor::Decrypt to string16.

BUG=43460
R=mirandac@chromium.org

Review URL: http://codereview.chromium.org/8833001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@113396 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/importer/nss_decryptor_win.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -11,6 +11,7 @@
 
 #include "base/basictypes.h"
 #include "base/native_library.h"
+#include "base/string16.h"
 
 // The following declarations of functions and types are from Firefox
 // NSS library.
@@ -124,7 +125,7 @@ class NSSDecryptor {
 
   // Decrypts Firefox stored passwords. Before using this method,
   // make sure Init() returns true.
-  std::wstring Decrypt(const std::string& crypt) const;
+  string16 Decrypt(const std::string& crypt) const;
 
   // Parses the Firefox password file content, decrypts the
   // username/password and reads other related information.