Do not cache NSScreens.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.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 CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_FOLDER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_FOLDER_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 118 matching lines @@
   CGFloat verticalScrollDelta_;
 
   // We need to know the size of the vertical scrolling arrows so we
   // can obscure/unobscure them.
   CGFloat verticalScrollArrowHeight_;
 
   // Set to YES to prevent any node animations. Useful for unit testing so that
   // incomplete animations do not cause valgrind complaints.
   BOOL ignoreAnimations_;
 
-  // The screen to which the menu should be restricted.
-  NSScreen* screen_;
-
   int selectedIndex_;
   NSString* typedPrefix_;
 
   Profile* profile_;
 }
 
 // Designated initializer.
 - (id)initWithParentButton:(BookmarkButton*)button
           parentController:(BookmarkBarFolderController*)parentController
              barController:(BookmarkBarController*)barController
@@ skipping 54 matching lines @@
 - (NSView*)visibleView;
 - (NSScrollView*)scrollView;
 - (NSView*)folderView;
 
 - (IBAction)openBookmarkFolderFromButton:(id)sender;
 
 - (BookmarkButton*)buttonForDroppingOnAtPoint:(NSPoint)point;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_FOLDER_CONTROLLER_H_