MacViews: Overlay Scrollbars with Show/Hide Animations

ui/base/test/scoped_preferred_scroller_style_legacy_mac.h

-// Copyright 2016 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_BASE_TEST_SCOPED_PREFERRED_SCROLLER_STYLE_LEGACY_MAC_H_
-#define UI_BASE_TEST_SCOPED_PREFERRED_SCROLLER_STYLE_LEGACY_MAC_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace base {
-namespace mac {
-class ScopedObjCClassSwizzler;
-}
-}
-
-namespace ui {
-namespace test {
-
-// Overrides system setting for scrollbar style with NSScrollerStyleLegacy,
-// which means "always show scrollbars".
-class ScopedPreferredScrollerStyleLegacy {
- public:
-  ScopedPreferredScrollerStyleLegacy();
-  ~ScopedPreferredScrollerStyleLegacy();
-
- private:
-  scoped_ptr<base::mac::ScopedObjCClassSwizzler> swizzler_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedPreferredScrollerStyleLegacy);
-};
-
-}  // namespace test
-}  // namespace ui
-
-#endif  // UI_BASE_TEST_SCOPED_PREFERRED_SCROLLER_STYLE_LEGACY_MAC_H_