Code cleanup: Pass vector by const-ref rather than by value.

components/autofill/core/browser/personal_data_manager.cc

 // Copyright 2013 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 "components/autofill/core/browser/personal_data_manager.h"
 
 #include <algorithm>
 #include <functional>
 #include <iterator>
 
@@ skipping 546 matching lines @@
 
 void PersonalDataManager::Refresh() {
   LoadProfiles();
   LoadCreditCards();
 }
 
 void PersonalDataManager::GetProfileSuggestions(
     const AutofillType& type,
     const base::string16& field_contents,
     bool field_is_autofilled,
-    std::vector<ServerFieldType> other_field_types,
+    const std::vector<ServerFieldType>& other_field_types,
     std::vector<base::string16>* values,
     std::vector<base::string16>* labels,
     std::vector<base::string16>* icons,
     std::vector<GUIDPair>* guid_pairs) {
   values->clear();
   labels->clear();
   icons->clear();
   guid_pairs->clear();
 
   const std::vector<AutofillProfile*>& profiles = GetProfiles();
@@ skipping 452 matching lines @@
   if (!votes.empty()) {
     std::map<std::string, int>::iterator iter =
         std::max_element(votes.begin(), votes.end(), CompareVotes);
     return iter->first;
   }
 
   return std::string();
 }
 
 }  // namespace autofill