chromium/chrome/browser/resources/extensions/keyboard_shortcuts.html

<style include="md-select cr-shared-style">
  :host {
    height: 100%;
  }

  .shortcut-card {
    background-color: var(--cr-card-background-color);
    border-radius: var(--cr-card-border-radius);
    box-shadow: var(--cr-card-shadow);
    color: var(--cr-primary-text-color);
    margin: 0 auto 16px auto;
    padding-bottom: 8px;
    width: var(--cr-toolbar-field-width);
  }

  .shortcut-card:last-of-type {
    margin-bottom: 64px;
  }

  #container {
    box-sizing: border-box;
    height: 100%;
    padding-top: 24px;
  }

  .command-entry {
    align-items: start;
    display: flex;
    /* Makes top/bottom spacing of each row more even, while leaving
       space for cr-input error message in between rows. */
    margin-bottom: -8px;
    padding-top: 16px;
  }

  .command-name {
    /* Align with cr-input by matching the field's top padding. */
    flex: 1;
    margin-top: 6px;
  }

  .command-entry .md-select {
    /* TODO(johntlee): line-height needs adjustment to fix large fonts. */
    line-height: 22px;
    margin-inline-start: var(--cr-section-padding);
  }

  .card-title {
    align-items: center;
    border-bottom: var(--cr-separator-line);
    display: flex;
    margin-bottom: 9px;
    padding: 16px var(--cr-section-padding);
  }

  .icon {
    height: 20px;
    margin-inline-end: 20px;
    width: 20px;
  }

  .card-controls {
    /* We line up the controls with the name, which is after the
       20px left padding + 20px icon + 20px margin on the icon. */
    margin-inline-end: 20px;
    margin-inline-start: 60px;
  }
</style>
<div id="container">
  <template is="dom-repeat" items="[[calculateShownItems_(items.*)]]">
    <div class="shortcut-card">
      <div class="card-title cr-title-text">
        <img class="icon" src="[[item.iconUrl]]" alt="">
        <span role="heading" aria-level="2">[[item.name]]</span>
      </div>
      <div class="card-controls">
        <template is="dom-repeat" items="[[item.commands]]" as="command">
          <div class="command-entry" command="[[command]]">
            <span class="command-name">[[command.description]]</span>
            <extensions-shortcut-input delegate="[[delegate]]"
                item="[[item]]" shortcut="[[command.keybinding]]"
                command="[[command]]">
            </extensions-shortcut-input>
            <!-- Binding "value" to triggerScopeChange_ to trigger update
                only after CommandScope_ becomes available. -->
            <select class="md-select" on-change="onScopeChanged_"
                aria-label="[[computeScopeAriaLabel_(item, command)]]"
                disabled$="[[computeScopeDisabled_(command)]]"
                value="[[
                    triggerScopeChange_(command.scope, CommandScope_)]]">
              <option value$="[[CommandScope_.CHROME]]">
                $i18n{shortcutScopeInChrome}
              </option>
              <option value$="[[CommandScope_.GLOBAL]]">
                $i18n{shortcutScopeGlobal}
              </option>
            </select>
          </div>
        </template>
      </div>
    </div>
  </template>
</div>