Remove non USE_AURA code from views files.

ui/gfx/screen_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/gfx/screen_win.h"
 
 #include <windows.h>
 
 #include "base/hash.h"
 #include "base/logging.h"
@@ skipping 128 matching lines @@
 
 void ScreenWin::AddObserver(DisplayObserver* observer) {
   // TODO(oshima): crbug.com/122863.
 }
 
 void ScreenWin::RemoveObserver(DisplayObserver* observer) {
   // TODO(oshima): crbug.com/122863.
 }
 
 HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
-#if defined(USE_AURA)
   NOTREACHED();
   return NULL;
-#else
-  return window;
-#endif  // USE_AURA
 }
 
 NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
-#if defined(USE_AURA)
   NOTREACHED();
   return NULL;
-#else
-  return hwnd;
-#endif  // USE_AURA
 }
 
-#if !defined(USE_AURA)
-Screen* CreateNativeScreen() {
-  return new ScreenWin;
-}
-#endif  // !USE_AURA
-
 }  // namespace gfx