[autofill] Add support for PSL domain matching for password autofill.

chrome/browser/password_manager/password_form_manager.h

Index: chrome/browser/password_manager/password_form_manager.h
diff --git a/chrome/browser/password_manager/password_form_manager.h b/chrome/browser/password_manager/password_form_manager.h
index cd5cf3ede3f56b02f59cd48dc27c1eacf0064332..877729908a3cae9cd0c2c6adcad5cd15fed6e344 100644
--- a/chrome/browser/password_manager/password_form_manager.h
+++ b/chrome/browser/password_manager/password_form_manager.h
@@ -79,6 +79,11 @@ class PasswordFormManager : public PasswordStoreConsumer {
   // managed by this.
   bool IsNewLogin();
 
+  // Returns true if the current pending credentials were found using
+  // origin matching of the public suffix, instead of the signon realm of the
+  // form.
+  bool IsPendingCredentialsPublicSuffixMatch();
+
   // Checks if the form is a valid password form. Forms which lack either
   // login or password field are not considered valid.
   bool HasValidPasswordForm();