Vertical scrolling arrows in bookmark bar folder windows when needed....

chrome/browser/cocoa/bookmark_bar_folder_window.h

 // Copyright (c) 2010 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 CHROME_BROWSER_COCOA_BOOKMARK_BAR_FOLDER_WINDOW_H_
 #define CHROME_BROWSER_COCOA_BOOKMARK_BAR_FOLDER_WINDOW_H_
 
 #import <Cocoa/Cocoa.h>
+#import "base/cocoa_protocols_mac.h"
+#include "base/scoped_nsobject.h"
+
 
 // Window for a bookmark folder "menu".  This menu pops up when you
 // click on a bookmark button that represents a folder of bookmarks.
 // This window is borderless.
 @interface BookmarkBarFolderWindow : NSWindow
 @end
 
 // Content view for the above window.  "Stock" other than the drawing
 // of rounded corners.  Only used in the nib.
-@interface BookmarkBarFolderWindowContentView : NSView
+@interface BookmarkBarFolderWindowContentView : NSView {
+  // Arrows to show ability to scroll up and down as needed.
+  scoped_nsobject<NSImage> arrowUpImage_;
+  scoped_nsobject<NSImage> arrowDownImage_;
+}
 @end
 
 // Scroll view that contains the main view (where the buttons go).
 @interface BookmarkBarFolderWindowScrollView : NSScrollView
 @end
 
 
 #endif  // CHROME_BROWSER_COCOA_BOOKMARK_BAR_FOLDER_WINDOW_H_