[Sync] Log age of auth tokens on authentication failure

chrome/browser/signin/about_signin_internals.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_ABOUT_SIGNIN_INTERNALS_H_
 #define CHROME_BROWSER_SIGNIN_ABOUT_SIGNIN_INTERNALS_H_
 
 #include <map>
 #include <string>
 
@@ skipping 64 matching lines @@
   //       },
   //       { "title": "Detailed Information",
   //        "data": [List of {"label" : "foo-field", "value" : "foo"} elems]
   //       }],
   //   "token_info" :
   //     [ List of {"name": "foo-name", "token" : "foo-token",
   //                 "status": "foo_stat", "time" : "foo_time"} elems]
   //  }
   scoped_ptr<DictionaryValue> GetSigninStatus();
 
+  // Returns the time of the last fetch/refresh for the token specified by
+  // |token_name|. See signin_internals_util::kTokenPrefsArray for valid token
+  // names. If |token_name| is invalid, returns base::Time().
+  base::Time GetTokenTime(const std::string& token_name) const;
+
  private:
   void NotifyObservers();
 
   // Weak pointer to parent profile.
   Profile* profile_;
 
   // Encapsulates the actual signin and token related values.
   // Most of the values are mirrored in the prefs for persistance.
   signin_internals_util::SigninStatus signin_status_;
 
   ObserverList<Observer> signin_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AboutSigninInternals);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_ABOUT_SIGNIN_INTERNALS_H_