Do not invalidate OAuth token status user when token handle is invalid.

chrome/browser/chromeos/login/signin/token_handle_util.h

 // Copyright 2015 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_CHROMEOS_LOGIN_SIGNIN_TOKEN_HANDLE_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_TOKEN_HANDLE_UTIL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 22 matching lines @@
 
   enum TokenHandleStatus { VALID, INVALID, UNKNOWN };
 
   typedef base::Callback<void(const user_manager::UserID&, TokenHandleStatus)>
       TokenValidationCallback;
 
   // Returns true if UserManager has token handle associated with |user_id|.
   bool HasToken(const user_manager::UserID& user_id);
 
   // Removes token handle for |user_id| from UserManager storage.
-  void DeleteToken(const user_manager::UserID& user_id);
+  void DeleteHandle(const user_manager::UserID& user_id);
+
+  //

[Nikita (slow), 2015/05/12 17:45:57]

nit: comment is missing?

+  void MarkHandleInvalid(const user_manager::UserID& user_id);
+
+  bool ShouldObtainHandle(const user_manager::UserID& user_id);

[Nikita (slow), 2015/05/12 17:45:57]

nit: same here

 
   // Performs token handle check for |user_id|. Will call |callback| with
   // corresponding result.
   void CheckToken(const user_manager::UserID& user_id,
                   const TokenValidationCallback& callback);
 
   // Given the OAuth |access_token| attempt to obtain token handle and store it
   // for |user_id|.
   void GetTokenHandle(const user_manager::UserID& user_id,
                       const std::string& access_token,
@@ skipping 43 matching lines @@
 
   // Instance of GAIA Client.
   scoped_ptr<gaia::GaiaOAuthClient> gaia_client_;
 
   base::WeakPtrFactory<TokenHandleUtil> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TokenHandleUtil);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_TOKEN_HANDLE_UTIL_H_