Convert autofill messages to use the new IPC macros (again).

chrome/browser/autofill/credit_card_field.cc

Index: chrome/browser/autofill/credit_card_field.cc
===================================================================
--- chrome/browser/autofill/credit_card_field.cc	(revision 77304)
+++ chrome/browser/autofill/credit_card_field.cc	(working copy)
@@ -118,7 +118,7 @@
         &credit_card_field->number_))
       continue;
 
-    if ((*q) && LowerCaseEqualsASCII((*q)->form_control_type(), "month")) {
+    if ((*q) && LowerCaseEqualsASCII((*q)->form_control_type, "month")) {
       credit_card_field->expiration_month_ = *q++;
     } else {
       // "Expiration date" is the most common label here, but some pages have
@@ -187,7 +187,7 @@
       credit_card_field->expiration_month_ &&
       (credit_card_field->expiration_year_ ||
       (LowerCaseEqualsASCII(
-           credit_card_field->expiration_month_->form_control_type(),
+           credit_card_field->expiration_month_->form_control_type,
            "month")))) {
       *iter = q;
       return credit_card_field.release();