[Do not commit] Track revocations in content_settings::Observer

components/signin/core/browser/account_reconcilor.cc

 // Copyright 2014 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 "components/signin/core/browser/account_reconcilor.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 174 matching lines @@
                : signin_metrics::ACCOUNT_RECONCILOR_OK;
   }
 
   return signin_metrics::ACCOUNT_RECONCILOR_RUNNING;
 }
 
 void AccountReconcilor::OnContentSettingChanged(
     const ContentSettingsPattern& primary_pattern,
     const ContentSettingsPattern& secondary_pattern,
     ContentSettingsType content_type,
+    ContentSetting previous_value,
     std::string resource_identifier) {
   // If this is not a change to cookie settings, just ignore.
   if (content_type != CONTENT_SETTINGS_TYPE_COOKIES)
     return;
 
   // If this does not affect GAIA, just ignore.  If the primary pattern is
   // invalid, then assume it could affect GAIA.  The secondary pattern is
   // not needed.
   if (primary_pattern.IsValid() &&
       !primary_pattern.Matches(GaiaUrls::GetInstance()->gaia_url())) {
@@ skipping 287 matching lines @@
           << "Account added: " << account_id << ", "
           << "Error was " << error.ToString();
   // Always listens to GaiaCookieManagerService. Only proceed if reconciling.
   if (is_reconcile_started_ && MarkAccountAsAddedToCookie(account_id)) {
     if (error.state() != GoogleServiceAuthError::State::NONE)
       error_during_last_reconcile_ = true;
     CalculateIfReconcileIsDone();
     ScheduleStartReconcileIfChromeAccountsChanged();
   }
 }