Set datapresent string to contain precisely those field types available in stored Autofill data.

chrome/browser/autofill/personal_data_manager_mac.mm

 // Copyright (c) 2011 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/autofill/personal_data_manager.h"
 
 #import <AddressBook/AddressBook.h>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 223 matching lines @@
       profile->SetInfo(PHONE_FAX_NUMBER, number);
       profile->SetInfo(PHONE_FAX_CITY_CODE, city_code);
       profile->SetInfo(PHONE_FAX_COUNTRY_CODE, country_code);
     }
   }
 }
 
 }  // namespace
 
 // Populate |auxiliary_profiles_| with the Address Book data.
-void PersonalDataManager::LoadAuxiliaryProfiles() {
+void PersonalDataManager::LoadAuxiliaryProfiles() const {
   AuxiliaryProfilesImpl impl(&auxiliary_profiles_);
   impl.GetAddressBookMeCard();
 }