Making bookmark folder context menu display the number of bookmarks that will be opened by Open All

chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.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.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.h"
 
 #import "base/mac/foundation_util.h"
 #include "base/metrics/user_metrics.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_BOOKMARK_MENU
@@ skipping 102 matching lines @@
 
   Browser* browser = chrome::FindTabbedBrowser(bridge_->GetProfile(), true);
   if (!browser) {
     browser = new Browser(Browser::CreateParams(bridge_->GetProfile(), true));
   }
   DCHECK(browser);
 
   if (!node || !browser)
     return; // shouldn't be reached
 
-  chrome::OpenAll(NULL, browser, node, disposition, browser->profile());
+  chrome::OpenAll(nullptr, browser, node, disposition, browser->profile());
 
   if (disposition == WindowOpenDisposition::NEW_FOREGROUND_TAB) {
     base::RecordAction(UserMetricsAction("OpenAllBookmarks"));
   } else if (disposition == WindowOpenDisposition::NEW_WINDOW) {
     base::RecordAction(UserMetricsAction("OpenAllBookmarksNewWindow"));
   } else {
     base::RecordAction(UserMetricsAction("OpenAllBookmarksIncognitoWindow"));
   }
 }
 
@@ skipping 17 matching lines @@
   WindowOpenDisposition disposition = WindowOpenDisposition::NEW_WINDOW;
   [self openAll:[sender tag] withDisposition:disposition];
 }
 
 - (IBAction)openAllBookmarksIncognitoWindow:(id)sender {
   WindowOpenDisposition disposition = WindowOpenDisposition::OFF_THE_RECORD;
   [self openAll:[sender tag] withDisposition:disposition];
 }
 
 @end  // BookmarkMenuCocoaController