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

components/autofill/core/browser/autofill_field.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_field.h"
 
 #include "base/logging.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
@@ skipping 273 matching lines @@
 
 // Fills |field| with the street address in |value|.  Translates newlines into
 // equivalent separators when necessary, i.e. when filling a single-line field.
 void FillStreetAddress(const base::string16& value,
                        FormFieldData* field) {
   if (field->form_control_type == "textarea") {
     field->value = value;
     return;
   }
 
-  base::string16 one_line_value;
-  const base::char16 kNewline[] = { '\n', 0 };
-  const base::string16 separator =
+  const base::string16& separator =
       l10n_util::GetStringUTF16(IDS_AUTOFILL_ADDRESS_LINE_SEPARATOR);
-  base::ReplaceChars(value, kNewline, separator, &one_line_value);
-  field->value = one_line_value;
+  base::ReplaceChars(value, base::ASCIIToUTF16("\n"), separator, &field->value);
 }
 
 std::string Hash32Bit(const std::string& str) {
   std::string hash_bin = base::SHA1HashString(str);
   DCHECK_EQ(20U, hash_bin.length());
 
   uint32 hash32 = ((hash_bin[0] & 0xFF) << 24) |
                   ((hash_bin[1] & 0xFF) << 16) |
                   ((hash_bin[2] & 0xFF) << 8) |
                    (hash_bin[3] & 0xFF);
@@ skipping 97 matching lines @@
   } else if (type.GetStorableType() == ADDRESS_HOME_STREET_ADDRESS) {
     FillStreetAddress(value, field_data);
     return true;
   }
 
   field_data->value = value;
   return true;
 }
 
 }  // namespace autofill