mac: Remove unused includes of scoped_nsobject.h.

chrome/browser/ui/cocoa/tab_contents/render_view_context_menu_mac.mm

 // Copyright (c) 2012 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/ui/cocoa/tab_contents/render_view_context_menu_mac.h"
 
 #include "base/compiler_specific.h"
-#include "base/mac/scoped_nsobject.h"
 #import "base/mac/scoped_sending_event.h"
 #include "base/message_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "grit/generated_resources.h"
 #import "ui/base/cocoa/menu_controller.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 260 matching lines @@
                                      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];
 }