Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser

chrome/browser/notifications/message_center_settings_controller.cc

Index: chrome/browser/notifications/message_center_settings_controller.cc
diff --git a/chrome/browser/notifications/message_center_settings_controller.cc b/chrome/browser/notifications/message_center_settings_controller.cc
index 921f477cea04c664519e7b034335105f9931ae4c..48fd5296f88efc4d128fd1d3efdcd2e2f1e96093 100644
--- a/chrome/browser/notifications/message_center_settings_controller.cc
+++ b/chrome/browser/notifications/message_center_settings_controller.cc
@@ -317,20 +317,20 @@ void MessageCenterSettingsController::OnProfileAuthInfoChanged(
 void MessageCenterSettingsController::OnIconImageUpdated(
     const message_center::NotifierId& id,
     const gfx::Image& image) {
-  FOR_EACH_OBSERVER(message_center::NotifierSettingsObserver, observers_,
-                    UpdateIconImage(id, image));
+  for (message_center::NotifierSettingsObserver& observer : observers_)
+    observer.UpdateIconImage(id, image);
 }
 
 void MessageCenterSettingsController::OnNotifierEnabledChanged(
     const message_center::NotifierId& id,
     bool enabled) {
-  FOR_EACH_OBSERVER(message_center::NotifierSettingsObserver, observers_,
-                    NotifierEnabledChanged(id, enabled));
+  for (message_center::NotifierSettingsObserver& observer : observers_)
+    observer.NotifierEnabledChanged(id, enabled);
 }
 
 void MessageCenterSettingsController::DispatchNotifierGroupChanged() {
-  FOR_EACH_OBSERVER(message_center::NotifierSettingsObserver, observers_,
-                    NotifierGroupChanged());
+  for (message_center::NotifierSettingsObserver& observer : observers_)
+    observer.NotifierGroupChanged();
 }
 
 #if defined(OS_CHROMEOS)