Nukes USE_AURA ifdefs from views

ui/views/controls/webview/unhandled_keyboard_event_handler_win.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/views/controls/webview/unhandled_keyboard_event_handler.h"
 
 #include "base/logging.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "ui/events/event.h"
 #include "ui/views/focus/focus_manager.h"
@@ skipping 39 matching lines @@
       return;
     }
 
     // ProcessAccelerator didn't handle the accelerator, so we know both
     // that |this| is still valid, and that we didn't want to set the flag.
     ignore_next_char_event_ = false;
   }
 
   // Any unhandled keyboard/character messages should be defproced.
   // This allows stuff like F10, etc to work correctly.
-#if defined(USE_AURA)
   if (!event.os_event)
     return;
   const MSG& message(event.os_event->native_event());
-#else
-  const MSG& message(event.os_event);
-#endif
   DefWindowProc(message.hwnd, message.message, message.wParam, message.lParam);
 }
 
 }  // namespace views