Reduce FOR_EACH_OBSERVER usage in ui/

ui/chromeos/network/network_icon_animation.cc

 // Copyright (c) 2013 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 "ui/chromeos/network/network_icon_animation.h"
 
 #include "ui/chromeos/network/network_icon_animation_observer.h"
 
 namespace {
 const int kThrobDurationMs = 750;  // Animation cycle length.
 }
 
 namespace ui {
 namespace network_icon {
 
 NetworkIconAnimation::NetworkIconAnimation()
     : animation_(this) {
   // Set up the animation throbber.
   animation_.SetThrobDuration(kThrobDurationMs);
   animation_.SetTweenType(gfx::Tween::LINEAR);
 }
 
 NetworkIconAnimation::~NetworkIconAnimation() {
 }
 
 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() {
   if (!animation_.is_animating()) {
     animation_.Reset();
     animation_.StartThrobbing(-1 /*throb indefinitely*/);
     return 0;
   }
   return animation_.GetCurrentValue();
 }
@@ skipping 11 matching lines @@
 
 // static
 NetworkIconAnimation* NetworkIconAnimation::GetInstance() {
   static NetworkIconAnimation* s_icon_animation =
       new NetworkIconAnimation();
   return s_icon_animation;
 }
 
 }  // namespace network_icon
 }  // namespace ui