Change CookieStore::DeleteCallback to take uint32_t.

ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm

 // Copyright 2015 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 "ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.h"
 
 #include <map>
 #include <set>
 #include <string>
 
@@ skipping 429 matching lines @@
 
   NotifyAndDeleteIfDone();
 }
 
 void IOSChromeBrowsingDataRemover::OnClearedPasswords() {
   DCHECK_CURRENTLY_ON(WebThread::UI);
   waiting_for_clear_passwords_ = false;
   NotifyAndDeleteIfDone();
 }
 
-void IOSChromeBrowsingDataRemover::OnClearedCookies(int num_deleted) {
+void IOSChromeBrowsingDataRemover::OnClearedCookies(uint32_t num_deleted) {
   if (!WebThread::CurrentlyOn(WebThread::UI)) {
     WebThread::PostTask(
         WebThread::UI, FROM_HERE,
         base::Bind(&IOSChromeBrowsingDataRemover::OnClearedCookies,
                    base::Unretained(this), num_deleted));
     return;
   }
 
   DCHECK_GT(waiting_for_clear_cookies_count_, 0);
   --waiting_for_clear_cookies_count_;
@@ skipping 54 matching lines @@
   waiting_for_clear_autofill_origin_urls_ = false;
   NotifyAndDeleteIfDone();
 }
 
 // static
 IOSChromeBrowsingDataRemover::CallbackSubscription
 IOSChromeBrowsingDataRemover::RegisterOnBrowsingDataRemovedCallback(
     const IOSChromeBrowsingDataRemover::Callback& callback) {
   return GetOnBrowsingDataRemovedCallbacks()->Add(callback);
 }