Remove usage of FOR_EACH_OBSERVER macro in components/signin

components/signin/core/browser/account_tracker_service.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_tracker_service.h"
 
 #include <stddef.h>
 
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 150 matching lines @@
 
 // static
 AccountTrackerService::AccountIdMigrationState
 AccountTrackerService::GetMigrationState(const PrefService* pref_service) {
   return static_cast<AccountTrackerService::AccountIdMigrationState>(
       pref_service->GetInteger(prefs::kAccountIdMigrationState));
 }
 
 void AccountTrackerService::NotifyAccountUpdated(const AccountState& state) {
   DCHECK(!state.info.gaia.empty());
-  FOR_EACH_OBSERVER(
-      Observer, observer_list_, OnAccountUpdated(state.info));
+  for (auto& observer : observer_list_)
+    observer.OnAccountUpdated(state.info);
 }
 
 void AccountTrackerService::NotifyAccountUpdateFailed(
     const std::string& account_id) {
-  FOR_EACH_OBSERVER(
-      Observer, observer_list_, OnAccountUpdateFailed(account_id));
+  for (auto& observer : observer_list_)
+    observer.OnAccountUpdateFailed(account_id);
 }
 
 void AccountTrackerService::NotifyAccountRemoved(const AccountState& state) {
   DCHECK(!state.info.gaia.empty());
-  FOR_EACH_OBSERVER(
-      Observer, observer_list_, OnAccountRemoved(state.info));
+  for (auto& observer : observer_list_)
+    observer.OnAccountRemoved(state.info);
 }
 
 void AccountTrackerService::StartTrackingAccount(
     const std::string& account_id) {
   if (!base::ContainsKey(accounts_, account_id)) {
     DVLOG(1) << "StartTracking " << account_id;
     AccountState state;
     state.info.account_id = account_id;
     state.info.is_child_account = false;
     accounts_.insert(make_pair(account_id, state));
@@ skipping 307 matching lines @@
       NotifyAccountUpdated(state);
     }
     SaveToPrefs(state);
   }
   return info.account_id;
 }
 
 void AccountTrackerService::RemoveAccount(const std::string& account_id) {
   StopTrackingAccount(account_id);
 }