Remove usage of FOR_EACH_OBSERVER macro in services/

services/ui/ws/user_id_tracker.cc

 // Copyright 2016 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 "services/ui/ws/user_id_tracker.h"
 
 #include "services/shell/public/interfaces/connector.mojom.h"
 #include "services/ui/ws/user_id_tracker_observer.h"
 
 namespace ui {
@@ skipping 10 matching lines @@
   return ids_.count(id) > 0;
 }
 
 void UserIdTracker::SetActiveUserId(const UserId& id) {
   DCHECK(IsValidUserId(id));
   if (id == active_id_)
     return;
 
   const UserId previously_active_id = active_id_;
   active_id_ = id;
-  FOR_EACH_OBSERVER(UserIdTrackerObserver, observers_,
-                    OnActiveUserIdChanged(previously_active_id, id));
+  for (auto& observer : observers_)
+    observer.OnActiveUserIdChanged(previously_active_id, id);
 }
 
 void UserIdTracker::AddUserId(const UserId& id) {
   if (IsValidUserId(id))
     return;
 
   ids_.insert(id);
-  FOR_EACH_OBSERVER(UserIdTrackerObserver, observers_, OnUserIdAdded(id));
+  for (auto& observer : observers_)
+    observer.OnUserIdAdded(id);
 }
 
 void UserIdTracker::RemoveUserId(const UserId& id) {
   DCHECK(IsValidUserId(id));
   ids_.erase(id);
-  FOR_EACH_OBSERVER(UserIdTrackerObserver, observers_, OnUserIdRemoved(id));
+  for (auto& observer : observers_)
+    observer.OnUserIdRemoved(id);
 }
 
 void UserIdTracker::AddObserver(UserIdTrackerObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void UserIdTracker::RemoveObserver(UserIdTrackerObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void UserIdTracker::Bind(mojom::UserAccessManagerRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 void UserIdTracker::SetActiveUser(const mojo::String& user_id) {
   if (!IsValidUserId(user_id))
     AddUserId(user_id);
   SetActiveUserId(user_id);
 }
 
 }  // namespace ws
 }  // namespace ui