Added Layer based clipping to MenuScrollViewContainer::MenuScrollView

ui/views/controls/menu/menu_scroll_view_container.h

 // Copyright (c) 2011 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_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_
 
 #include "base/macros.h"
 #include "ui/views/bubble/bubble_border.h"
 #include "ui/views/controls/menu/menu_types.h"
 #include "ui/views/view.h"
 
 namespace views {
 
 class SubmenuView;
 
 // MenuScrollViewContainer contains the SubmenuView (through a MenuScrollView)
 // and two scroll buttons. The scroll buttons are only visible and enabled if
 // the preferred height of the SubmenuView is bigger than our bounds.
 class MenuScrollViewContainer : public View {
  public:
+  static const char kViewClassName[];
+
   explicit MenuScrollViewContainer(SubmenuView* content_view);
 
   // Returns the buttons for scrolling up/down.
   View* scroll_down_button() const { return scroll_down_button_; }
   View* scroll_up_button() const { return scroll_up_button_; }
 
   // External function to check if the bubble border is usd.
   bool HasBubbleBorder();
 
   // Offsets the Arrow from the default location.
   void SetBubbleArrowOffset(int offset);
 
   // View overrides.
+  const char* GetClassName() const override;
   gfx::Size GetPreferredSize() const override;
   void Layout() override;
   void OnPaintBackground(gfx::Canvas* canvas) override;
   void GetAccessibleState(ui::AXViewState* state) override;
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
 
  protected:
   // View override.
   void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
 
@@ skipping 23 matching lines @@
 
   // Weak reference to the currently set border.
   BubbleBorder* bubble_border_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuScrollViewContainer);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_SCROLL_VIEW_CONTAINER_H_