Move SigninTracker away from listening for SigninManager notifications

chrome/browser/signin/fake_signin_manager.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_SIGNIN_FAKE_SIGNIN_MANAGER_H_
 #define CHROME_BROWSER_SIGNIN_FAKE_SIGNIN_MANAGER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 30 matching lines @@
   virtual ~FakeSigninManager();
 
   void set_auth_in_progress(const std::string& username) {
     possibly_invalid_username_ = username;
   }
 
   void set_password(const std::string& password) { password_ = password; }
 
   void SignIn(const std::string& username, const std::string& password);
 
+  void FailSignin(const GoogleServiceAuthError& error);
+
   virtual void SignOut() OVERRIDE;
 
   virtual void StartSignInWithCredentials(
       const std::string& session_index,
       const std::string& username,
       const std::string& password,
       const OAuthTokenFetchedCallback& oauth_fetched_callback) OVERRIDE;
 
   virtual void CompletePendingSignin() OVERRIDE;
 };
 
 #endif  // !defined (OS_CHROMEOS)
 
 #if defined(OS_CHROMEOS)
 typedef FakeSigninManagerBase FakeSigninManagerForTesting;
 #else
 typedef FakeSigninManager FakeSigninManagerForTesting;
 #endif
 
 #endif  // CHROME_BROWSER_SIGNIN_FAKE_SIGNIN_MANAGER_H_