Fix "unused variable" warnings.

chrome/browser/password_manager/save_password_infobar_delegate_android.h

Index: chrome/browser/password_manager/save_password_infobar_delegate_android.h
diff --git a/chrome/browser/password_manager/save_password_infobar_delegate_android.h b/chrome/browser/password_manager/save_password_infobar_delegate_android.h
index e12ba0e65c48699fbd90f12a59e3c2c6ea37cce0..09a0fc9ad603c508a63b6070756e38b6a433a060 100644
--- a/chrome/browser/password_manager/save_password_infobar_delegate_android.h
+++ b/chrome/browser/password_manager/save_password_infobar_delegate_android.h
@@ -19,10 +19,6 @@ namespace content {
 class WebContents;
 }
 
-namespace password_manager {
-enum class CredentialSourceType;
-}
-
 // After a successful *new* login attempt, we take the PasswordFormManager in
 // provisional_save_manager_ and move it to a SavePasswordInfoBarDelegate while
 // the user makes up their mind with the "save password" infobar. Note if the
@@ -69,10 +65,6 @@ class SavePasswordInfoBarDelegate : public PasswordManagerInfoBarDelegate {
   // signal.
   base::ElapsedTimer timer_;
 
-  // Records source from where infobar was triggered.
-  // Infobar appearance (message, buttons) depends on value of this parameter.
-  password_manager::CredentialSourceType source_type_;
-
   bool should_show_first_run_experience_;
 
   content::WebContents* web_contents_;