[Mac] Remove more dead code from bookmark bar controller

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h
index d7fb6e2960cbf2eb94ac143690462e72b121970a..221168dfb06802b36f1619023659716918725d28 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h
@@ -183,13 +183,6 @@ willAnimateFromState:(BookmarkBar::State)oldState
   // Our initial view width, which is applied in awakeFromNib.
   CGFloat initialWidth_;
 
-  // BookmarkNodes have a 64bit id.  NSMenuItems have a 32bit tag used
-  // to represent the bookmark node they refer to.  This map provides
-  // a mapping from one to the other, so we can properly identify the
-  // node from the item.  When adding items in, we start with seedId_.
-  int32_t seedId_;
-  std::map<int32_t, int64_t> menuTagMap_;
-
   // Our bookmark buttons, ordered from L-->R.
   base::scoped_nsobject<NSMutableArray> buttons_;
 
@@ -452,8 +445,6 @@ willAnimateFromState:(BookmarkBar::State)oldState
 - (NSRect)frameForBookmarkButtonFromCell:(NSCell*)cell xOffset:(int*)xOffset;
 - (void)checkForBookmarkButtonGrowth:(NSButton*)button;
 - (void)frameDidChange;
-- (int64_t)nodeIdFromMenuTag:(int32_t)tag;
-- (int32_t)menuTagFromNodeId:(int64_t)menuid;
 - (void)updateTheme:(const ui::ThemeProvider*)themeProvider;
 - (BookmarkButton*)buttonForDroppingOnAtPoint:(NSPoint)point;
 - (BOOL)isEventAnExitEvent:(NSEvent*)event;