Clear out some minor TODOs.

BUG=none

Review URL: https://codereview.chromium.org/1047063002

Cr-Commit-Position: refs/heads/master@{#322959}
ui::ModalType CardUnmaskPromptViews::GetModalType() const {
  return ui::MODAL_TYPE_CHILD;
}

ui::ModalType CardUnmaskPromptViews::GetModalType() const {
  return ui::MODAL_TYPE_CHILD;
}
