Reduce FOR_EACH_OBSERVER usage in ui/

ui/gfx/win/singleton_hwnd.cc

 // Copyright (c) 2012 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/gfx/win/singleton_hwnd.h"
 
 #include "base/memory/singleton.h"
 #include "base/message_loop/message_loop.h"
 #include "ui/gfx/win/singleton_hwnd_observer.h"
 
 namespace gfx {
 
 // static
 SingletonHwnd* SingletonHwnd::GetInstance() {
   return base::Singleton<SingletonHwnd>::get();
 }
 
 BOOL SingletonHwnd::ProcessWindowMessage(HWND window,
                                          UINT message,
                                          WPARAM wparam,
                                          LPARAM lparam,
                                          LRESULT& result,
                                          DWORD msg_map_id) {
-  FOR_EACH_OBSERVER(SingletonHwndObserver,
-                    observer_list_,
-                    OnWndProc(window, message, wparam, lparam));
+  for (SingletonHwndObserver& observer : observer_list_)
+    observer.OnWndProc(window, message, wparam, lparam);
   return false;
 }
 
 SingletonHwnd::SingletonHwnd() {
   if (!base::MessageLoopForUI::IsCurrent()) {
     // Creating this window in (e.g.) a renderer inhibits shutdown on
     // Windows. See http://crbug.com/230122 and http://crbug.com/236039.
     return;
   }
   WindowImpl::Init(NULL, Rect());
 }
 
 SingletonHwnd::~SingletonHwnd() {
   // WindowImpl will clean up the hwnd value on WM_NCDESTROY.
   if (hwnd())
     DestroyWindow(hwnd());
 
   // Tell all of our current observers to clean themselves up.
-  FOR_EACH_OBSERVER(SingletonHwndObserver, observer_list_, ClearWndProc());
+  for (SingletonHwndObserver& observer : observer_list_)
+    observer.ClearWndProc();
 }
 
 void SingletonHwnd::AddObserver(SingletonHwndObserver* observer) {
   observer_list_.AddObserver(observer);
 }
 
 void SingletonHwnd::RemoveObserver(SingletonHwndObserver* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 }  // namespace gfx