Remove usage of FOR_EACH_OBSERVER macro in ash/common

ash/common/shelf/shelf_button.cc

 // Copyright 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 "ash/common/shelf/shelf_button.h"
 
 #include <algorithm>
 
 #include "ash/common/ash_constants.h"
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 103 matching lines @@
     }
     return animation_;
   }
 
   // gfx::AnimationDelegate
   void AnimationProgressed(const gfx::Animation* animation) override {
     if (animation != &animation_)
       return;
     if (!animation_.is_animating())
       return;
-    FOR_EACH_OBSERVER(Observer, observers_, AnimationProgressed());
+    for (auto& observer : observers_)
+      observer.AnimationProgressed();
   }
 
   gfx::ThrobAnimation animation_;
   base::ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfButtonAnimation);
 };
 
 }  // namespace
 
@@ skipping 458 matching lines @@
         bar_->SetHorizontalAlignment(views::ImageView::TRAILING);
         bar_->SetVerticalAlignment(views::ImageView::CENTER);
         break;
     }
     bar_->SchedulePaint();
   }
   bar_->SetVisible(bar_id != 0 && state_ != STATE_NORMAL);
 }
 
 }  // namespace ash