MacViews: Overlay Scrollbars with Show/Hide Animations

ui/native_theme/native_theme_mac.h

 // Copyright (c) 2013 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_NATIVE_THEME_NATIVE_THEME_MAC_H_
 #define UI_NATIVE_THEME_NATIVE_THEME_MAC_H_
 
 #include "base/macros.h"
 #include "ui/native_theme/native_theme_base.h"
 #include "ui/native_theme/native_theme_export.h"
@@ skipping 10 matching lines @@
 
   // Overridden from NativeThemeBase:
   void PaintScrollbarTrack(SkCanvas* canvas,
                            Part part,
                            State state,
                            const ScrollbarTrackExtraParams& extra_params,
                            const gfx::Rect& rect) const override;
   void PaintScrollbarThumb(SkCanvas* sk_canvas,
                            Part part,
                            State state,
+                           const ScrollbarThumbExtraParams& extra_params,
                            const gfx::Rect& rect) const override;
   void PaintScrollbarCorner(SkCanvas* canvas,
                             State state,
                             const gfx::Rect& rect) const override;
   void PaintMenuPopupBackground(
       SkCanvas* canvas,
       const gfx::Size& size,
       const MenuBackgroundExtraParams& menu_background) const override;
   void PaintMenuItemBackground(
       SkCanvas* canvas,
       State state,
       const gfx::Rect& rect,
       const MenuListExtraParams& menu_list) const override;
 
  private:
   NativeThemeMac();
   ~NativeThemeMac() override;
 
   DISALLOW_COPY_AND_ASSIGN(NativeThemeMac);
 };
 
 }  // namespace ui
 
 #endif  // UI_NATIVE_THEME_NATIVE_THEME_MAC_H_