Update easy unlock settings UI.

chrome/browser/resources/options/browser_options.html

 <div id="settings" class="page" hidden>
   <header>
     <h1 i18n-content="settingsTitle"></h1>
   </header>
   <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">
       <h3 i18n-content="sectionTitleInternet"></h3>
@@ skipping 482 matching lines @@
     </div>
 <if expr="is_macosx">
     <div id="mac-passwords-warning" i18n-content="macPasswordsWarning" hidden>
     </div>
 </if>
   </section>
   <section id="easy-unlock-section" guest-visibility="hidden" hidden>
     <h3 i18n-content="easyUnlockSectionTitle"></h3>
     <!-- Options shown when the user has not set up Easy Unlock -->
     <div id='easy-unlock-setup' hidden>
-      <button id="easy-unlock-setup-button"
-          i18n-content="easyUnlockSetupButton"></button>
-      <div>
+      <div class="controlled-setting-with-label">
+        <span i18n-content="easyUnlockSetupIntro"></span>
         <a target="_blank" i18n-content="learnMore"
             i18n-values="href:easyUnlockLearnMoreURL"></a>
       </div>
+      <button id="easy-unlock-setup-button"
+          i18n-content="easyUnlockSetupButton"></button>
     </div>
     <!-- Options shown when the user has set up Easy Unlock -->
     <div id='easy-unlock-enable' hidden>
-      <div class="checkbox">
-        <span class="controlled-setting-with-label">
-          <input id="easy-unlock-check" type="checkbox"
-              pref="easy_unlock.enabled"
-              metric="EasyUnlock_Enabled">
-          <span>
-            <label for="easy-unlock-checkbox">
-              <span i18n-content="easyUnlockCheckboxLabel"></span>
-              <a target="_blank" i18n-content="learnMore"
-                  i18n-values="href:easyUnlockLearnMoreURL"></a>
-            </label>
-            <span class="controlled-setting-indicator"
-                pref="easy_unlock.enabled">
-            </span>
-          </span>
-        </span>
+      <div class="controlled-setting-with-label">
+        <span i18n-content="easyUnlockDescription"></span>
+        <a target="_blank" i18n-content="learnMore"
+            i18n-values="href:easyUnlockLearnMoreURL"></a>
       </div>
-      <div>
-        <a target="_blank" i18n-content="easyUnlockManagement"
-            i18n-values="href:easyUnlockManagementURL"></a>
-      </div>
+      <button id="easy-unlock-turn-off-button"
+          i18n-content="easyUnlockTurnOffButton"></button>
     </div>
   </section>
   <section id="web-content-section">
     <h3 i18n-content="advancedSectionTitleContent"></h3>
     <div>
       <div id="website-settings-section" class="settings-row" hidden>
         <button id="website-management-button"
             i18n-content="websitesManage"></button>
       </div>
       <div class="settings-row">
@@ skipping 415 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>