chrome/browser/resources/chromeos/multidevice_internals/logging_tab.html

<style include="shared-style">
  :host {
    --standard-border: 1px solid black;
  }

  #logs-list {
    display: flex;
    flex-direction: column;
    height: 100%;
    white-space: pre-wrap;
  }

  log-object {
    border-inline-end: var(--standard-border);
    border-inline-start: var(--standard-border);
    border-top: var(--standard-border);
  }

  log-object:last-child {
    border-bottom: var(--standard-border);
  }
</style>
<cr-button disabled="[[!logList_.length]]" class="internals-button"
    on-click="onSaveLogsButtonClicked_">
  Save Logs
</cr-button>
<cr-button disabled="[[!logList_.length]]" class="internals-button"
    on-click="onClearLogsButtonClicked_">
  Clear Logs
</cr-button>
<iron-list items="[[logList_]]" as="log" id="logs-list">
  <template>
    <log-object log-message="[[log]]">
    </log-object>
  </template>
</iron-list>