[Autofill] Modified to remove const qualifiers from FormField and AutofillScanner implementation.

components/autofill/core/browser/credit_card_field.h

Index: components/autofill/core/browser/credit_card_field.h
diff --git a/components/autofill/core/browser/credit_card_field.h b/components/autofill/core/browser/credit_card_field.h
index bf45e7ee6efb0194481158448104546b07e9ff85..f39ceb1679fd5cf1e0eea5ab5d0628fd3faa6cb6 100644
--- a/components/autofill/core/browser/credit_card_field.h
+++ b/components/autofill/core/browser/credit_card_field.h
@@ -31,7 +31,7 @@ class CreditCardField : public FormField {
 
   CreditCardField();
 
-  const AutofillField* cardholder_;  // Optional.
+  AutofillField* cardholder_;  // Optional.
 
   // Occasionally pages have separate fields for the cardholder's first and
   // last names; for such pages cardholder_ holds the first name field and
@@ -40,20 +40,20 @@ class CreditCardField : public FormField {
   // because the text patterns for matching a cardholder name are different
   // than for ordinary names, and because cardholder names never have titles,
   // middle names or suffixes.)
-  const AutofillField* cardholder_last_;
+  AutofillField* cardholder_last_;
 
   // TODO(jhawkins): Parse the select control.
-  const AutofillField* type_;  // Optional.
-  const AutofillField* number_;  // Required.
+  AutofillField* type_;    // Optional.
+  AutofillField* number_;  // Required.
 
   // The 3-digit card verification number; we don't currently fill this.
-  const AutofillField* verification_;
+  AutofillField* verification_;
 
   // Either |expiration_date_| or both |expiration_month_| and
   // |expiration_year_| are required.
-  const AutofillField* expiration_month_;
-  const AutofillField* expiration_year_;
-  const AutofillField* expiration_date_;
+  AutofillField* expiration_month_;
+  AutofillField* expiration_year_;
+  AutofillField* expiration_date_;
 
   // True if the year is detected to be a 2-digit year; otherwise, we assume
   // a 4-digit year.