Add support for autofilling radio buttons and checkboxes.

chrome/test/data/autofill/heuristics/output/20_register_alaskaair.com.out

Index: chrome/test/data/autofill/heuristics/output/20_register_alaskaair.com.out
diff --git a/chrome/test/data/autofill/heuristics/output/20_register_alaskaair.com.out b/chrome/test/data/autofill/heuristics/output/20_register_alaskaair.com.out
index 354c8a17034b9002b1fdd39686c4e120fc9e08b2..e2af6c2a364f8d40f276f5af0a49d15556b41af8 100644
--- a/chrome/test/data/autofill/heuristics/output/20_register_alaskaair.com.out
+++ b/chrome/test/data/autofill/heuristics/output/20_register_alaskaair.com.out
@@ -1,3 +1,5 @@
+UNKNOWN_TYPE | FormUserControl$_mileagePlanNumber$_mileagePlanChoice | Mileage Plan™ Number * | _needMileagePlanNbr
+UNKNOWN_TYPE | FormUserControl$_mileagePlanNumber$_mileagePlanChoice | I have an Alaska Airlines Mileage Plan Number | _haveMileagePlanNbr
 UNKNOWN_TYPE | FormUserControl$_mileagePlanNumber$_loyaltyNumber$_loyaltyNumber | Mileage Plan Number | 
 NAME_FIRST | FormUserControl$_personalIdentification$_firstName$_name | Legal First Name* | 
 UNKNOWN_TYPE | FormUserControl$_personalIdentification$_title$_title | Title | 
@@ -28,4 +30,8 @@ EMAIL_ADDRESS | FormUserControl$_contactInformation$_emailAddress$_emailAddressT
 UNKNOWN_TYPE | FormUserControl$_userIdPassword$_userId$_userId | Create a User ID* | 
 UNKNOWN_TYPE | FormUserControl$_secretQuestion$_question | Secret Question* | 
 UNKNOWN_TYPE | FormUserControl$_secretQuestion$_answer | Please choose a secret question and provide the answer. You will need to answer the question again in case you forget your password. Make sure you choose a question and answer that are easy for you to remember, but difficult for other people to know.Secret Question* Answer* | 
+UNKNOWN_TYPE | FormUserControl$_subscriptionsOffers$_insiderNewsletter$_subscriptionCheckBox | Insider NewsletterA weekly email personalized to provide you with an insider glimpse of the best deals we have to offer - across the board. | on
 ADDRESS_HOME_CITY | FormUserControl$_subscriptionsOffers$_primaryDepartureCity$_primaryDepartureCity$_city | Primary Departure City | 
+UNKNOWN_TYPE | FormUserControl$_subscriptionsOffers$_eStatements$_subscriptionCheckBox | Mileage Plan E-Statements and Partner OffersA monthly recap of your Mileage Plan activity along with program news, exclusive partner offers, and countless ways to earn free travel faster. | on
+UNKNOWN_TYPE | FormUserControl$_subscriptionsOffers$_asQXAnnouncements$_subscriptionCheckBox | Alaska AnnouncementsOccasional email that puts you "in the know" about sales, promotions, and other important travel information. | on
+UNKNOWN_TYPE | FormUserControl$_mpTermsAndConditions$_iAgree | Mileage Plan™ Terms & Conditions* I acknowledge that I have reviewed these Mileage Plan Terms and Conditions | on