Reduce FOR_EACH_OBSERVER usage in ui/

ui/chromeos/network/network_icon_animation.cc

Index: ui/chromeos/network/network_icon_animation.cc
diff --git a/ui/chromeos/network/network_icon_animation.cc b/ui/chromeos/network/network_icon_animation.cc
index 055a10b09aafe10e8a3c4418a39f2f624573a967..9ed3a473b8361fa23c9c4d7deb3b8d98cd446565 100644
--- a/ui/chromeos/network/network_icon_animation.cc
+++ b/ui/chromeos/network/network_icon_animation.cc
@@ -27,7 +27,8 @@ void NetworkIconAnimation::AnimationProgressed(
     const gfx::Animation* animation) {
   if (animation != &animation_)
     return;
-  FOR_EACH_OBSERVER(AnimationObserver, observers_, NetworkIconChanged());
+  for (AnimationObserver& observer : observers_)
+    observer.NetworkIconChanged();
 }
 
 double NetworkIconAnimation::GetAnimation() {