chromium/chrome/browser/resources/password_manager/credential_details/credential_field.html

<style include="cr-input-style cr-shared-style shared-style credential-details-card"></style>

<cr-input value="[[value]]" id="inputValue" readonly class="input-field"
      label="[[label]]" placeholder="[[placeholder]]" role="textbox"
      aria-disabled="true">
  <cr-icon-button id="copyButton" class="icon-copy-content"
      slot="inline-suffix" title="[[copyButtonLabel]]"
      on-click="onCopyValueClick_" hidden="[[!value]]">
  </cr-icon-button>
</cr-input>