Prevent autofilling credit card security number fields with passwords.

components/autofill/content/renderer/password_form_conversion_utils.h

Index: components/autofill/content/renderer/password_form_conversion_utils.h
diff --git a/components/autofill/content/renderer/password_form_conversion_utils.h b/components/autofill/content/renderer/password_form_conversion_utils.h
index 0529ac2c3d421677075ec0d598e5ecfd8aaea12a..77358e47c34bc15e2e71b39086f4b3804c1efc3e 100644
--- a/components/autofill/content/renderer/password_form_conversion_utils.h
+++ b/components/autofill/content/renderer/password_form_conversion_utils.h
@@ -68,6 +68,10 @@ bool HasAutocompleteAttributeValue(const blink::WebInputElement& element,
 // the given |element| are present.
 bool HasCreditCardAutocompleteAttributes(const blink::WebInputElement& element);
 
+// Returns whether the form |field| has a "password" type, but looks like a
+// credit card verification field.
+bool IsCreditCardVerificationPasswordField(const blink::WebInputElement& field);
+
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_FORM_CONVERSION_UTILS_H__