autofill: switch autofill_regexes to RE2 library

components/autofill/core/browser/form_field.cc

Index: components/autofill/core/browser/form_field.cc
diff --git a/components/autofill/core/browser/form_field.cc b/components/autofill/core/browser/form_field.cc
index 50d7e8a30a81cf74343e3656627695840085f9cf..4c11c89a99930a5cb3df40cc8586d6953772aa32 100644
--- a/components/autofill/core/browser/form_field.cc
+++ b/components/autofill/core/browser/form_field.cc
@@ -180,12 +180,14 @@ bool FormField::Match(const AutofillField* field,
                       const base::string16& pattern,
                       int match_type) {
   if ((match_type & FormField::MATCH_LABEL) &&
-      MatchesPattern(field->label, pattern)) {
+      MatchesPattern(base::UTF16ToASCII(field->label),
+                     base::UTF16ToASCII(pattern))) {
     return true;
   }
 
   if ((match_type & FormField::MATCH_NAME) &&
-      MatchesPattern(field->name, pattern)) {
+      MatchesPattern(base::UTF16ToASCII(field->name),
+                     base::UTF16ToASCII(pattern))) {
     return true;
   }