Remove usage of FOR_EACH_OBSERVER macro in ash/common

ash/common/wm/dock/docked_window_layout_manager.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 "ash/common/wm/dock/docked_window_layout_manager.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/shelf_background_animator.h"
 #include "ash/common/shelf/shelf_background_animator_observer.h"
 #include "ash/common/shelf/shelf_constants.h"
@@ skipping 1279 matching lines @@
   int dock_inset = docked_width + (docked_width > 0 ? kMinDockGap : 0);
   const gfx::Rect work_area =
       dock_container_->GetDisplayNearestWindow().work_area();
   gfx::Rect bounds = gfx::Rect(
       alignment_ == DOCKED_ALIGNMENT_RIGHT && dock_inset > 0
           ? dock_container_->GetBounds().right() - dock_inset
           : dock_container_->GetBounds().x(),
       dock_container_->GetBounds().y(), dock_inset, work_area.height());
   docked_bounds_ =
       bounds + dock_container_->GetBoundsInScreen().OffsetFromOrigin();
-  FOR_EACH_OBSERVER(DockedWindowLayoutManagerObserver, observer_list_,
-                    OnDockBoundsChanging(bounds, reason));
+  for (auto& observer : observer_list_)
+    observer.OnDockBoundsChanging(bounds, reason);
   // Show or hide background for docked area.
   gfx::Rect background_bounds(docked_bounds_);
   if (shelf_observer_)
     background_bounds.Subtract(shelf_observer_->shelf_bounds_in_screen());
   if (docked_width > 0) {
     // TODO: |shelf_| should not be null by the time we get here, but it may
     // be in mash as startup sequence doesn't yet match that of ash. Once
     // |shelf_| is created at same time as ash we can remove conditional.
     // http://crbug.com/632099
     if (shelf_) {
@@ skipping 66 matching lines @@
     const gfx::Rect& keyboard_bounds) {
   // This bounds change will have caused a change to the Shelf which does not
   // propagate automatically to this class, so manually recalculate bounds.
   Relayout();
   UpdateDockBounds(DockedWindowLayoutManagerObserver::KEYBOARD_BOUNDS_CHANGING);
 }
 
 void DockedWindowLayoutManager::OnKeyboardClosed() {}
 
 }  // namespace ash