Removed unused include file in credential_manager.

ios/chrome/browser/passwords/credential_manager.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.
 
 #import "ios/chrome/browser/passwords/credential_manager.h"
 
 #include <utility>
 
-#include "base/ios/ios_util.h"
 #import "base/ios/weak_nsobject.h"
 #include "base/mac/bind_objc_block.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/password_manager/core/browser/password_store_consumer.h"
 #include "components/password_manager/core/common/credential_manager_types.h"
 #include "components/password_manager/core/common/password_manager_pref_names.h"
 #import "ios/chrome/browser/passwords/js_credential_manager.h"
 #import "ios/web/public/url_scheme_util.h"
@@ skipping 357 matching lines @@
 bool CredentialManager::GetUrlWithAbsoluteTrust(GURL* page_url) {
   web::URLVerificationTrustLevel trust_level =
       web::URLVerificationTrustLevel::kNone;
   const GURL possibly_untrusted_url(web_state()->GetCurrentURL(&trust_level));
   if (trust_level == web::URLVerificationTrustLevel::kAbsolute) {
     *page_url = possibly_untrusted_url;
     return true;
   }
   return false;
 }