[Sync] Log age of auth tokens on authentication failure

chrome/browser/signin/about_signin_internals_factory.cc

 // 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.
 
 #include "chrome/browser/signin/about_signin_internals_factory.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/signin/about_signin_internals.h"
 #include "chrome/browser/signin/signin_internals_util.h"
@@ skipping 44 matching lines @@
         value.c_str(), std::string(), PrefRegistrySyncable::UNSYNCABLE_PREF);
     user_prefs->RegisterStringPref(
         time.c_str(), std::string(), PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
   // TokenService information for about:signin-internals.
   for (size_t i = 0; i < kNumTokenPrefs; i++) {
     const std::string pref = TokenPrefPath(kTokenPrefsArray[i]);
     const std::string value = pref + ".value";
     const std::string status = pref + ".status";
     const std::string time = pref + ".time";
+    const std::string time_internal = pref + ".time_internal";
     user_prefs->RegisterStringPref(
         value.c_str(), std::string(), PrefRegistrySyncable::UNSYNCABLE_PREF);
     user_prefs->RegisterStringPref(
         status.c_str(), std::string(), PrefRegistrySyncable::UNSYNCABLE_PREF);
     user_prefs->RegisterStringPref(
         time.c_str(), std::string(), PrefRegistrySyncable::UNSYNCABLE_PREF);
+    user_prefs->RegisterInt64Pref(
+        time_internal.c_str(), 0, PrefRegistrySyncable::UNSYNCABLE_PREF);
   }
 }
 
 ProfileKeyedService* AboutSigninInternalsFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   AboutSigninInternals* service = new AboutSigninInternals();
   service->Initialize(static_cast<Profile*>(profile));
   return service;
 }