Make HasAutocompleteAttributeValue handle multi-valued strings

components/autofill/core/common/autofill_util.cc

 // Copyright 2015 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/common/autofill_util.h"
 
 #include <algorithm>
-#include <vector>
 
 #include "base/command_line.h"
 #include "base/i18n/case_conversion.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "components/autofill/core/common/autofill_switches.h"
@@ skipping 106 matching lines @@
   } else {
     if (isCheckable) {
       form_field_data->check_status =
           FormFieldData::CheckStatus::CHECKABLE_BUT_UNCHECKED;
     } else {
       form_field_data->check_status = FormFieldData::CheckStatus::NOT_CHECKABLE;
     }
   }
 }
 
+std::vector<std::string> LowercaseAndTokenizeAttributeString(
+    const std::string& attribute) {
+  return base::SplitString(base::ToLowerASCII(attribute),
+                           base::kWhitespaceASCII, base::TRIM_WHITESPACE,
+                           base::SPLIT_WANT_NONEMPTY);
+}
+
 }  // namespace autofill