Replace ToLower calls to the new format

chrome/installer/util/language_selector.cc

 // 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.
 //
 // This file defines a helper class for selecting a supported language from a
 // set of candidates.
 
 #include "chrome/installer/util/language_selector.h"
 
 #include <algorithm>
@@ skipping 225 matching lines @@
 // Runs through the set of candidates, sending their downcased representation
 // through |select_predicate|.  Returns true if the predicate selects a
 // candidate, in which case |matched_name| is assigned the value of the
 // candidate and |matched_offset| is assigned the language offset of the
 // selected translation.
 // static
 bool LanguageSelector::SelectIf(const std::vector<std::wstring>& candidates,
                                 SelectPred_Fn select_predicate,
                                 std::wstring* matched_name,
                                 int* matched_offset) {
-  std::wstring candidate;
-  for (std::vector<std::wstring>::const_iterator scan = candidates.begin(),
-          end = candidates.end(); scan != end; ++scan) {
-    candidate.assign(*scan);
-    base::StringToLowerASCII(&candidate);
-    if (select_predicate(candidate, matched_offset)) {
-      matched_name->assign(*scan);
+  for (const std::wstring& scan : candidates) {
+    if (select_predicate(base::ToLowerASCII(scan), matched_offset)) {
+      matched_name->assign(scan);
       return true;
     }
   }
 
   return false;
 }
 
 // Select the best-fit translation from the ordered list |candidates|.
 // At the conclusion, this instance's |matched_candidate_| and |offset_| members
 // are set to the name of the selected candidate and the offset of the matched
 // translation.  If no translation is selected, the fallback's name and offset
 // are selected.
 void LanguageSelector::DoSelect(const std::vector<std::wstring>& candidates) {
   // Make a pass through the candidates looking for an exact or alias match.
   // Failing that, make another pass looking for a wildcard match.
   if (!SelectIf(candidates, &GetLanguageOffset, &matched_candidate_,
                 &offset_) &&
       !SelectIf(candidates, &MatchLanguageOffset, &matched_candidate_,
                 &offset_)) {
     VLOG(1) << "No suitable language found for any candidates.";
 
     // Our fallback is "en-us"
     matched_candidate_.assign(&kFallbackLanguage[0],
                               arraysize(kFallbackLanguage) - 1);
     offset_ = kFallbackLanguageOffset;
   }
 }
 
 }  // namespace installer