[ios] Records Presentation UMA for Legacy UpdatePassword

Bug: 945478
Change-Id: I3e9811cc1ca39f99fe19eb75a75c89b0521b32e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1621071
Commit-Queue: Vasilii Sukhanov <vasilii@chromium.org>
Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661696}

ios/chrome/browser/passwords/ios_chrome_update_password_infobar_delegate.mm

@@ -64,6 +64,8 @@ IOSChromeUpdatePasswordInfoBarDelegate::IOSChromeUpdatePasswordInfoBarDelegate(
   form_to_save()->GetMetricsRecorder()->RecordPasswordBubbleShown(
       form_to_save()->GetCredentialSource(),
       password_manager::metrics_util::AUTOMATIC_WITH_PASSWORD_PENDING_UPDATE);
+  password_manager::metrics_util::LogUIDisplayDisposition(
+      password_manager::metrics_util::AUTOMATIC_WITH_PASSWORD_PENDING_UPDATE);
 }
 
 bool IOSChromeUpdatePasswordInfoBarDelegate::ShowMultipleAccounts() const {