Enables the user to select multiple languages for spellchecking (UI)

chrome/browser/resources/options/language_options.html

 <div id="languagePage" class="page" hidden>
   <div class="close-button"></div>
   <h1 i18n-content="languagePage"></h1>
   <div class="content-area">
     <div id="notification">
       <span>&nbsp;</span>
       <span class="link"><span class="link-color"></span></span>
     </div>
     <div class="language-options-header">
       <span i18n-content="addLanguageInstructions"></span>
@@ skipping 23 matching lines @@
               i18n-content="displayInThisLanguage">
           </button>
           <span class="controlled-setting-indicator"></span>
           <span id="language-options-ui-language-message" hidden></span>
         </div>
 </if>
 <!-- Chrome uses the native OS spellchecker in OS X, so don't display the
      dictionary pane. -->
 <if expr="not is_macosx">
         <div id="language-options-spellcheck" class="language-options-contents">
-          <button id="language-options-spell-check-language-button"
+          <div class="checkbox" id="spellcheck-language-checkbox-container">
+            <label>
+              <input type="checkbox" id="spellcheck-language-checkbox">
+              <span i18n-content="useThisForSpellChecking"></span>
+            </label>
+          </div>
+          <button id="spellcheck-language-button"
               i18n-content="useThisForSpellChecking">
           </button>
-          <span id="language-options-spell-check-language-message" hidden>
+          <span id="spellcheck-language-message" hidden>

[Dan Beam, 2015/06/25 02:25:59]

<span id="spellcheck-language-message" hidden></span>

[Julius, 2015/07/06 22:38:52]

Done.

           </span>
           <span id="language-options-dictionary-downloading-message"
               i18n-content="downloadingDictionary" hidden>
           </span>
         </div>
         <div id="language-options-dictionary-download-failed-message"
             class="language-options-notification" hidden>
           <div i18n-content="downloadFailed"></div>
           <div id="language-options-dictionary-download-fail-help-message"
               i18n-content="downloadFailHelp" hidden>
@@ skipping 46 matching lines @@
     </div>
     <div class="language-options-footer">
 <if expr="chromeos">
       <div i18n-content="switchInputMethodsHint"></div>
       <div i18n-content="selectPreviousInputMethodHint"></div>
       <a is="action-link" id="edit-dictionary-button"
           class="standalone-action-link"
           i18n-content="languageDictionaryOverlayTitle"></a>
 </if>
 <if expr="not chromeos and not is_macosx">
-      <div id="spell-check-option" class="checkbox">
+      <div class="checkbox">
         <label>
-          <input id="enable-spell-check" pref="browser.enable_spellchecking"
+          <input id="enable-spellcheck" pref="browser.enable_spellchecking"
               metric="Options_SpellCheck" type="checkbox">
           <span i18n-content="enableSpellCheck"></span>
         </label>
         <a is="action-link" id="edit-dictionary-button"
             i18n-content="languageDictionaryOverlayTitle" hidden></a>
       </div>
       <div id="auto-spell-correction-option" class="checkbox" hidden>
         <label>
           <input id="enable-auto-spell-correction"
               pref="browser.enable_autospellcorrect"
               metric="Options_AutoSpellCorrection" type="checkbox">
           <span i18n-content="enableAutoSpellCorrection"></span>
         </label>
       </div>
 </if>
     </div>
   </div>
   <div class="action-area">
     <div class="button-strip">
       <button id="language-confirm" class="default-button" i18n-content="done">
       </button>
     </div>
   </div>
 </div>