chromium/chrome/browser/resources/settings/performance_page/memory_page.html

<style include="cr-shared-style settings-shared">
  .memory-saver-radio-group {
    padding-block-end: var(--cr-section-vertical-padding);
  }
</style>
<settings-toggle-button id="toggleButton" on-change="onMemorySaverModeChange_"
    pref="{{prefs.performance_tuning.high_efficiency_mode.state}}"
    label="$i18n{memorySaverModeLabel}"
    sub-label="$i18n{memorySaverModeDescription}"
    learn-more-url="$i18n{memorySaverLearnMoreUrl}"
    numeric-unchecked-values="[[numericUncheckedValues_]]"
    numeric-checked-value="[[numericCheckedValue_]]">
</settings-toggle-button>
<cr-collapse id="radioGroupCollapse" opened="[[isMemorySaverModeEnabled_(
        prefs.performance_tuning.high_efficiency_mode.state.value)]]">
  <div class="cr-row continuation memory-saver-radio-group">
    <settings-radio-group id="radioGroup"
      on-change="onMemorySaverModeAggressivenessChange_" pref="{{
            prefs.performance_tuning.high_efficiency_mode.aggressiveness}}"
      group-aria-label="$i18n{memorySaverModeRadioGroupAriaLabel}">
      <controlled-radio-button id="conservativeButton"
        label="$i18n{memorySaverModeConservativeLabel}"
        name$="[[memorySaverModeAggressivenessEnum_.CONSERVATIVE]]" pref="[[
              prefs.performance_tuning.high_efficiency_mode.aggressiveness]]">
        <div class="cr-secondary-text">
          $i18n{memorySaverModeConservativeDescription}
        </div>
      </controlled-radio-button>
      <controlled-radio-button id="mediumButton"
        label="$i18n{memorySaverModeMediumLabel}"
        name$="[[memorySaverModeAggressivenessEnum_.MEDIUM]]" pref="[[
              prefs.performance_tuning.high_efficiency_mode.aggressiveness]]">
        <div class="cr-secondary-text">
          $i18n{memorySaverModeMediumDescription}
        </div>
      </controlled-radio-button>
      <controlled-radio-button id="aggressiveButton"
        label="$i18n{memorySaverModeAggressiveLabel}"
        name$="[[memorySaverModeAggressivenessEnum_.AGGRESSIVE]]" pref="[[
              prefs.performance_tuning.high_efficiency_mode.aggressiveness]]">
        <div class="cr-secondary-text">
          $i18n{memorySaverModeAggressiveDescription}
        </div>
      </controlled-radio-button>
    </settings-radio-group>
  </div>
</cr-collapse>