Restore "caps lock" keyboard settings dropdown.

chrome/browser/resources/options/chromeos/keyboard_overlay.html

 <div id="keyboard-overlay" class="page" hidden>
   <div class="close-button"></div>
   <h1 i18n-content="keyboardOverlay"></h1>
   <div class="content-area">
     <table class="option-control-table">
        <tr>
          <td class="option-name" id="remap-search-key-to-label"
              i18n-content="remapSearchKeyToContent">
          </td>
          <td class="option-value">
@@ skipping 34 matching lines @@
             when --has-chromeos-keyboard flag is not passed. -->
        <tr id="caps-lock-remapping-section" hidden>
          <td class="option-name" id="remap-caps-lock-key-to-label"
                i18n-content="remapCapsLockKeyToContent">
          </td>
          <td class="option-value">
            <select class="control"
                data-type="number"
                metric="Options_KeyboardRemapCapsLockKey"
                pref="settings.language.remap_caps_lock_key_to"
+               i18n-options="remapCapsLockKeyToValue"
                aria-labelledby="remap-caps-lock-key-to-label" dialog-pref>
            </select>
          </td>
        </tr>
        <!-- The diamond key section is hidden by default. This is only visible
             when --has-chromeos-diamond-key flag is passed. -->
        <tr id="diamond-key-remapping-section" hidden>
          <td class="option-name" id="remap-diamond-key-to-label"
              i18n-content="remapDiamondKeyToContent">
          </td>
@@ skipping 60 matching lines @@
   </div>
   <div class="action-area">
     <div class="button-strip">
       <button id="keyboard-cancel" type="reset" i18n-content="cancel"></button>
       <button id="keyboard-confirm" class="default-button" type="submit"
           i18n-content="ok">
       </button>
     </div>
   </div>
 </div>