[Hotword] Remove unneeded preferences. Cleaning up look of settings.

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">
 <if expr="not pp_ifdef('chromeos')">
   <include src="sync_section.html">
 </if>
 <if expr="pp_ifdef('chromeos')">
   <section>
@@ skipping 121 matching lines @@
         <div class="settings-row">
           <select id="default-search-engine" class="weakrtl"></select>
           <span class="controlled-setting-indicator"
               pref="default_search_provider.enabled">
           </span>
           <button id="manage-default-search-engines"
               i18n-content="defaultSearchManageEngines">
           </button>
         </div>
       </div>
-      <div id ="hotword-search" hidden>
-        <div class="checkbox">
-          <span class="controlled-setting-with-label">
-            <input id="hotword-search-enable" pref="hotword.search_enabled"
-                type="checkbox">
-            <span>
-              <label for="hotword-search-enable"
-                  i18n-values=".innerHTML:hotwordSearchEnable">
-              </label>
-              <span class="controlled-setting-indicator"
-                  pref="hotword.search_enabled">
-              </span>
-            </span>
-          </span>
-          <div id="hotword-search-description" class="hotword-settings">
-            <span i18n-content="hotwordSearchDescription"></span>
-          </div>
-        </div>
-        <div id="hotword-settings-section" class="hotword-settings" hidden>
-          <div id="hotword-settings-section-container">
-            <div class="checkbox">
-              <span class="controlled-setting-with-label">
-                <input id="hotword-search-timeout"
-                    pref="hotword.search_timeout_enabled" type="checkbox">
-                <span>
-                  <label for="hotword-search-timeout"
-                      i18n-content="hotwordSearchTimeout">
-                  </label>
-                  <span class="controlled-setting-indicator"
-                      pref="hotword.search_timeout_enabled">
-                  </span>
-                </span>
-              </span>
-              <div id="hotword-search-timeout-description"
-                  class="hotword-settings">
-                <span i18n-content="hotwordSearchTimeoutDescription"></span>
-              </div>
-            </div>
-            <div class="checkbox">
-              <span class="controlled-setting-with-label">
-                <input id="hotword-search-incognito-enable"
-                    pref="hotword.incognito_search_enabled" type="checkbox">
-                <span>
-                  <label for="hotword-search-incognito-enable"
-                      i18n-content="hotwordSearchIncognito">
-                  </label>
-                  <span class="controlled-setting-indicator"
-                      pref="hotword.incognito_search_enabled">
-                  </span>
-                </span>
-              </span>
-            </div>
-          </div>
-        </div>
-      </div>
   </section>
   <section id="sync-users-section" guest-visibility="hidden">
     <h3 i18n-content="sectionTitleUsers"></h3>
 <if expr="pp_ifdef('chromeos')">
     <include src="sync_section.html">
 </if>
     <div id="profiles-section" hidden>
       <list id="profiles-list" class="settings-list" hidden></list>
       <div id="profiles-single-message" class="settings-row"
           i18n-content="profilesSingleUser">
@@ skipping 193 matching lines @@
             <a target="_blank" i18n-content="learnMore"
                 i18n-values="href:contentProtectionAttestationLearnMoreURL">
             </a>
             <span class="controlled-setting-indicator"
                 pref="cros.device.attestation_for_content_protection_enabled">
             </span>
           </span>
         </span>
       </div>
 </if>
+      <div id ="hotword-search" hidden>
+        <div class="checkbox">
+          <span class="controlled-setting-with-label">
+            <input id="hotword-search-enable" pref="hotword.search_enabled"
+                type="checkbox" dialog-pref>
+            <span>
+              <label for="hotword-search-enable"
+                  i18n-values=".innerHTML:hotwordSearchEnable">
+              </label>
+              <span class="controlled-setting-indicator"
+                  pref="hotword.search_enabled" dialog-pref>
+              </span>
+            </span>
+          </span>
+        </div>
+      </div>
     </div>
   </section>
 <if expr="pp_ifdef('chromeos')">
   <!-- By default, the bluetooth section is hidden.  It is only visible if a
        bluetooth adapter is discovered -->
   <section id="bluetooth-devices" hidden>
     <h3 i18n-content="bluetooth"></h3>
     <div id="bluetooth-options-div">
       <div class="checkbox">
         <label>
@@ skipping 493 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>