Add support for autofilling radio buttons and checkboxes.

chrome/renderer/autofill/form_autofill_util.h

Index: chrome/renderer/autofill/form_autofill_util.h
diff --git a/chrome/renderer/autofill/form_autofill_util.h b/chrome/renderer/autofill/form_autofill_util.h
index 395f8ed90a0312b5dab18d377fbe16a100631b88..792180a3c903db4dee0eef2baab4dfebee9b011b 100644
--- a/chrome/renderer/autofill/form_autofill_util.h
+++ b/chrome/renderer/autofill/form_autofill_util.h
@@ -52,6 +52,13 @@ bool IsTextInput(const WebKit::WebInputElement* element);
 // Returns true if |element| is a select element.
 bool IsSelectElement(const WebKit::WebFormControlElement& element);
 
+// Returns true if |element| is a checkbox or a radio button element.
+bool IsCheckableElement(const WebKit::WebInputElement* element);
+
+// Returns true if |element| is one of the input element that can be autofilled.
+// {Text, Radiobutton, Checkbox}
+bool IsAutofillableInputElement(const WebKit::WebInputElement* element);
+
 // Returns the form's |name| attribute if non-empty; otherwise the form's |id|
 // attribute.
 const string16 GetFormIdentifier(const WebKit::WebFormElement& form);