Make various string_util functions take StringPieces instead of char[].

components/autofill/core/browser/autofill_profile.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/autofill_profile.h"
 
 #include <algorithm>
 #include <functional>
 #include <map>
 #include <ostream>
@@ skipping 689 matching lines @@
       continue;
 
     if (!label.empty())
       label.append(separator);
 
     label.append(field);
     ++num_fields_used;
   }
 
   // Flatten the label if need be.
-  const base::char16 kNewline[] = { '\n', 0 };
-  const base::string16 newline_separator =
+  const base::string16& line_separator =
       l10n_util::GetStringUTF16(IDS_AUTOFILL_ADDRESS_LINE_SEPARATOR);
-  base::ReplaceChars(label, kNewline, newline_separator, &label);
+  base::ReplaceChars(label, base::ASCIIToUTF16("\n"), line_separator, &label);
 
   return label;
 }
 
 // static
 void AutofillProfile::CreateInferredLabelsHelper(
     const std::vector<AutofillProfile*>& profiles,
     const std::list<size_t>& indices,
     const std::vector<ServerFieldType>& fields,
     size_t num_fields_to_include,
@@ skipping 144 matching lines @@
       << UTF16ToUTF8(profile.GetRawInfo(ADDRESS_HOME_SORTING_CODE))
       << " "
       << UTF16ToUTF8(profile.GetRawInfo(ADDRESS_HOME_COUNTRY))
       << " "
       << profile.language_code()
       << " "
       << UTF16ToUTF8(MultiString(profile, PHONE_HOME_WHOLE_NUMBER));
 }
 
 }  // namespace autofill