Remove usage of FOR_EACH_OBSERVER macro in ui/app_list

ui/app_list/views/top_icon_animation_view.cc

Index: ui/app_list/views/top_icon_animation_view.cc
diff --git a/ui/app_list/views/top_icon_animation_view.cc b/ui/app_list/views/top_icon_animation_view.cc
index 32dc4a45430cf293dd66c41d794f12bf4866bc6e..8e024e3054d9bc1fe3164427705b4ae5d215b70b 100644
--- a/ui/app_list/views/top_icon_animation_view.cc
+++ b/ui/app_list/views/top_icon_animation_view.cc
@@ -82,9 +82,8 @@ void TopIconAnimationView::Layout() {
 
 void TopIconAnimationView::OnImplicitAnimationsCompleted() {
   SetVisible(false);
-  FOR_EACH_OBSERVER(TopIconAnimationObserver,
-                    observers_,
-                    OnTopIconAnimationsComplete());
+  for (auto& observer : observers_)
+    observer.OnTopIconAnimationsComplete();
   base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }