Add a 'hidden' parameter to RenderViewContextMenuProxy::UpdateMenuItem().

chrome/browser/tab_contents/render_view_context_menu_mac.mm

 // 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.
 
 #include "chrome/browser/tab_contents/render_view_context_menu_mac.h"
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_nsobject.h"
 #include "base/message_loop.h"
 #include "base/sys_string_conversions.h"
@@ skipping 125 matching lines @@
   // See the documentation on [NSPasteboard declareTypes].
   NSArray* toDeclare = [NSArray arrayWithObject:NSStringPboardType];
   [pboard declareTypes:toDeclare owner:nil];
   BOOL ok = [pboard setString:text forType:NSStringPboardType];
   if (ok)
     NSPerformService(@"Look Up in Dictionary", pboard);
 }
 
 void RenderViewContextMenuMac::UpdateMenuItem(int command_id,
                                               bool enabled,
+                                              bool hidden,
                                               const string16& title) {
   NSMenuItem* item = GetMenuItemByID(&menu_model_, [menuController_ menu],
                                      command_id);
   if (!item)
     return;
 
   // Update the returned NSMenuItem directly so we can update it immediately.
   [item setEnabled:enabled];
   [item setTitle:SysUTF16ToNSString(title)];
+  [item setHidden:hidden];
   [[item menu] itemChanged:item];
 }