Shows and hides the Voice section with the hotword checkbox.

chrome/browser/resources/options/browser_options.html

 <div id="settings" class="page" hidden>
   <header>
     <h1 i18n-content="settingsTitle"></h1>
   </header>
   <include src="reset_profile_settings_banner.html">
   <include src="automatic_settings_reset_banner.html">
 <if expr="chromeos">
   <include src="secondary_user_banner.html">
   <section>
     <div id="network-section-header" class="section-header">
@@ skipping 135 matching lines @@
           <span class="controlled-setting-indicator"
               pref="default_search_provider_data.template_url_data">
           </span>
           <button id="manage-default-search-engines"
               i18n-content="defaultSearchManageEngines">
           </button>
         </div>
       </div>
   </section>
   <section>
-    <h3 i18n-content="sectionTitleVoice"></h3>
+    <h3 id="voice-section-title" i18n-content="sectionTitleVoice" hidden></h3>
     <div id="voice-section-content">

[Matt Giuca, 2014/07/24 06:52:09]

I think you can put the <h3> inside this <div> and then make the hidden
attribute apply to the div (and remove it from the hotword-search div).

And update the JavaScript code accordingly. (Unless putting the <h3> inside the
<div> makes some weird styling issues.

[kcarattini, 2014/07/24 07:11:34]

Moving the h3 inside the div changes the indentation and would bring it out of
alignment with the other sections without more special formatting rules.

[Matt Giuca, 2014/07/24 07:13:29]

Acknowledged.

       <div id="hotword-search" hidden>
         <div class="checkbox">
           <span class="controlled-setting-with-label">
             <input id="hotword-search-enable" pref="hotword.search_enabled_2"
                 metric="Options_HotwordCheckbox" type="checkbox" dialog-pref>
             <span>
               <label for="hotword-search-enable"
                   i18n-values=".innerHTML:hotwordSearchEnable">
               </label>
               <span id="hotword-search-setting-indicator"
@@ skipping 786 matching lines @@
     </div>
   </section>
   </div>  <!-- advanced-settings-container -->
   </div>  <!-- advanced-settings -->
   <footer>
     <button id="advanced-settings-expander" class="link-button"
         i18n-content="showAdvancedSettings">
     </button>
   </footer>
   </div>