[Athena] Extract Chrome OS authentication stack

chromeos/login/auth/key.h

Index: chromeos/login/auth/key.h
diff --git a/chrome/browser/chromeos/login/auth/key.h b/chromeos/login/auth/key.h
similarity index 87%
rename from chrome/browser/chromeos/login/auth/key.h
rename to chromeos/login/auth/key.h
index 9b8e9725e71004495c983d7020b500a25e4e07cf..8aee6ddc898caa3a24b40cbd73cc3c6ac0928db7 100644
--- a/chrome/browser/chromeos/login/auth/key.h
+++ b/chromeos/login/auth/key.h
@@ -2,16 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_CHROMEOS_LOGIN_AUTH_KEY_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_AUTH_KEY_H_
+#ifndef CHROMEOS_LOGIN_AUTH_KEY_H_
+#define CHROMEOS_LOGIN_AUTH_KEY_H_
 
 #include <string>
 
+#include "chromeos/chromeos_export.h"
+
 namespace chromeos {
 
 // Key for user authentication. The class supports hashing of plain text
 // passwords to generate keys as well as the use of pre-hashed keys.
-class Key {
+class CHROMEOS_EXPORT Key {
  public:
   enum KeyType {
     // Plain text password.
@@ -49,4 +51,4 @@ class Key {
 
 }  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_AUTH_KEY_H_
+#endif  // CHROMEOS_LOGIN_AUTH_KEY_H_