Remove ui/gfx/screen_type_delegate.h

ui/gfx/screen_type_delegate.h

-// Copyright 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.
-
-#ifndef UI_GFX_SCREEN_TYPE_DELEGATE_H_
-#define UI_GFX_SCREEN_TYPE_DELEGATE_H_
-
-#include "build/build_config.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace gfx {
-
-enum ScreenType {
-  SCREEN_TYPE_NATIVE = 0,
-#if defined(OS_CHROMEOS)
-  SCREEN_TYPE_ALTERNATE = SCREEN_TYPE_NATIVE,
-#else
-  SCREEN_TYPE_ALTERNATE,
-#endif
-  SCREEN_TYPE_LAST = SCREEN_TYPE_ALTERNATE,
-};
-
-class GFX_EXPORT ScreenTypeDelegate {
- public:
-  virtual ~ScreenTypeDelegate() {}
-
-  // Determines which ScreenType a given |view| belongs to.
-  virtual ScreenType GetScreenTypeForNativeView(NativeView view) = 0;
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_SCREEN_TYPE_DELEGATE_H_