Allow the native theme to paint the corner between scrollbars

ui/views/controls/scroll_view.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_SCROLL_VIEW_H_
 #define UI_VIEWS_CONTROLS_SCROLL_VIEW_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 74 matching lines @@
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
 
   // ScrollBarController overrides:
   virtual void ScrollToPosition(ScrollBar* source, int position) OVERRIDE;
   virtual int GetScrollIncrement(ScrollBar* source,
                                  bool is_page,
                                  bool is_positive) OVERRIDE;
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(ScrollViewTest, CornerViewVisibility);
   class Viewport;
 
   // Used internally by SetHeader() and SetContents() to reset the view.  Sets
   // |member| to |new_view|. If |new_view| is non-null it is added to |parent|.
   void SetHeaderOrContents(View* parent, View* new_view, View** member);
 
   // Scrolls the minimum amount necessary to make the specified rectangle
   // visible, in the coordinates of the contents view. The specified rectangle
   // is constrained by the bounds of the contents view. This has no effect if
   // the contents have not been set.
   void ScrollContentsRegionToBeVisible(const gfx::Rect& rect);
 
   // Computes the visibility of both scrollbars, taking in account the view port
   // and content sizes.
   void ComputeScrollBarsVisibility(const gfx::Size& viewport_size,
                                    const gfx::Size& content_size,
                                    bool* horiz_is_shown,
                                    bool* vert_is_shown) const;
 
-  // Shows or hides the scrollbar/resize_corner based on the value of
+  // Shows or hides the scrollbar/corner_view based on the value of
   // |should_show|.
   void SetControlVisibility(View* control, bool should_show);
 
   // Update the scrollbars positions given viewport and content sizes.
   void UpdateScrollBarPositions();
 
   // The current contents and its viewport. |contents_| is contained in
   // |contents_viewport_|.
   View* contents_;
   View* contents_viewport_;
 
   // The current header and its viewport. |header_| is contained in
   // |header_viewport_|.
   View* header_;
   View* header_viewport_;
 
   // Horizontal scrollbar.
   ScrollBar* horiz_sb_;
 
   // Vertical scrollbar.
   ScrollBar* vert_sb_;
 
-  // Resize corner.
-  View* resize_corner_;
+  // Corner view.
+  View* corner_view_;
 
   // The min and max height for the bounded scroll view. These are negative
   // values if the view is not bounded.
   int min_height_;
   int max_height_;
 
   // If true, never show the horizontal scrollbar (even if the contents is wider
   // than the viewport).
   bool hide_horizontal_scrollbar_;
 
@@ skipping 66 matching lines @@
  private:
   int top_margin_;
   int row_height_;
 
   DISALLOW_COPY_AND_ASSIGN(FixedRowHeightScrollHelper);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_SCROLL_VIEW_H_