Update ToLower/UpperASCII API

components/autofill/core/browser/autofill_country.cc

Index: components/autofill/core/browser/autofill_country.cc
diff --git a/components/autofill/core/browser/autofill_country.cc b/components/autofill/core/browser/autofill_country.cc
index 5ed82bd58b20a3130e38d4a2ed13763ce1beff24..32b2139683945dd4ae29003f455e202dec804707 100644
--- a/components/autofill/core/browser/autofill_country.cc
+++ b/components/autofill/core/browser/autofill_country.cc
@@ -937,10 +937,8 @@ CountryNames::~CountryNames() {
 const std::string CountryNames::GetCountryCode(const base::string16& country,
                                                const std::string& locale) {
   // First, check common country names, including 2- and 3-letter country codes.
-  std::string country_utf8 = base::UTF16ToUTF8(
-      base::StringToUpperASCII(country));
-  std::map<std::string, std::string>::const_iterator result =
-      common_names_.find(country_utf8);
+  std::string country_utf8 = base::UTF16ToUTF8(base::ToUpperASCII(country));
+  const auto result = common_names_.find(country_utf8);
   if (result != common_names_.end())
     return result->second;