Clean up some ifdefs around Win Aura.

chrome/browser/lifetime/application_lifetime.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 "chrome/browser/lifetime/application_lifetime.h"
 
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 377 matching lines @@
   static bool notified = false;
   if (notified)
     return;
   notified = true;
   HandleAppExitingForPlatform();
 }
 
 bool ShouldStartShutdown(Browser* browser) {
   if (BrowserList::GetInstance(browser->host_desktop_type())->size() > 1)
     return false;
-#if defined(OS_WIN) && defined(USE_AURA)
+#if defined(OS_WIN)
   // On Windows 8 the desktop and ASH environments could be active
   // at the same time.
   // We should not start the shutdown process in the following cases:-
   // 1. If the desktop type of the browser going away is ASH and there
   //    are browser windows open in the desktop.
   // 2. If the desktop type of the browser going away is desktop and the ASH
   //    environment is still active.
   if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_NATIVE)
     return !ash::Shell::HasInstance();
   else if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH)
     return BrowserList::GetInstance(chrome::HOST_DESKTOP_TYPE_NATIVE)->empty();
 #endif
   return true;
 }
 
 }  // namespace chrome