Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

chrome/browser/status_icons/status_icon_menu_model.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 "chrome/browser/status_icons/status_icon_menu_model.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/base/accelerators/accelerator.h"
 #include "ui/gfx/image/image.h"
@@ skipping 145 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // StatusIconMenuModel, protected:
 
 void StatusIconMenuModel::MenuItemsChanged() {
   NotifyMenuStateChanged();
 }
 
 void StatusIconMenuModel::NotifyMenuStateChanged() {
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnMenuStateChanged());
+  for (Observer& observer : observer_list_)
+    observer.OnMenuStateChanged();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // StatusIconMenuModel, private:
 
 void StatusIconMenuModel::CommandIdHighlighted(int command_id) {
   if (delegate_)
     delegate_->CommandIdHighlighted(command_id);
 }
 
 void StatusIconMenuModel::ExecuteCommand(int command_id, int event_flags) {
   if (delegate_)
     delegate_->ExecuteCommand(command_id, event_flags);
 }