Guest mode doesn't show the Bookmarks item in Wrench Menu.

chrome/browser/ui/toolbar/wrench_menu_model.cc

 // 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/toolbar/wrench_menu_model.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/command_line.h"
@@ skipping 827 matching lines @@
 
   if (extensions::FeatureSwitch::extension_action_redesign()->IsEnabled())
     CreateExtensionToolbarOverflowMenu();
 
   AddItemWithStringId(IDC_NEW_TAB, IDS_NEW_TAB);
   AddItemWithStringId(IDC_NEW_WINDOW, IDS_NEW_WINDOW);
 
   if (ShouldShowNewIncognitoWindowMenuItem())
     AddItemWithStringId(IDC_NEW_INCOGNITO_WINDOW, IDS_NEW_INCOGNITO_WINDOW);
 
-  bookmark_sub_menu_model_.reset(new BookmarkSubMenuModel(this, browser_));
-  AddSubMenuWithStringId(IDC_BOOKMARKS_MENU, IDS_BOOKMARKS_MENU,
-                         bookmark_sub_menu_model_.get());
+  if (!browser_->profile()->IsGuestSession()) {
+    bookmark_sub_menu_model_.reset(new BookmarkSubMenuModel(this, browser_));
+    AddSubMenuWithStringId(IDC_BOOKMARKS_MENU, IDS_BOOKMARKS_MENU,
+                           bookmark_sub_menu_model_.get());
+  }
 
   if (!browser_->profile()->IsOffTheRecord()) {
     recent_tabs_sub_menu_model_.reset(new RecentTabsSubMenuModel(provider_,
                                                                  browser_,
                                                                  NULL));
     AddSubMenuWithStringId(IDC_RECENT_TABS_MENU, IDS_RECENT_TABS_MENU,
                            recent_tabs_sub_menu_model_.get());
   }
 
 #if defined(OS_WIN)
@@ skipping 223 matching lines @@
                        ->GetZoomPercent();
   }
   zoom_label_ = l10n_util::GetStringFUTF16(
       IDS_ZOOM_PERCENT, base::IntToString16(zoom_percent));
 }
 
 void WrenchMenuModel::OnZoomLevelChanged(
     const content::HostZoomMap::ZoomLevelChange& change) {
   UpdateZoomControls();
 }