Delete some unused code found by the clang static analyzer.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_button_cell.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_BUTTON_CELL_H_
 #define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_FOLDER_BUTTON_CELL_H_
 #pragma once
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h"
 
 class BookmarkNode;
 
 // A button cell that handles drawing/highlighting of buttons in the
 // bookmark bar.  This cell forwards mouseEntered/mouseExited events
 // to its control view so that pseudo-menu operations
 // (e.g. hover-over to open) can be implemented.
-@interface BookmarkBarFolderButtonCell : BookmarkButtonCell {
- @private
-  scoped_nsobject<NSColor> frameColor_;
-}
+@interface BookmarkBarFolderButtonCell : BookmarkButtonCell
 
 // Create a button cell which draws without a theme and with a frame
 // color provided by the ThemeService defaults.
 + (id)buttonCellForNode:(const BookmarkNode*)node
             contextMenu:(NSMenu*)contextMenu
                cellText:(NSString*)cellText
               cellImage:(NSImage*)cellImage;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BAR_FOLDER_BUTTON_CELL_H_