Add Easy Unlock options to chrome://settings behind a flag.

chrome/browser/resources/options/browser_options.js

Index: chrome/browser/resources/options/browser_options.js
diff --git a/chrome/browser/resources/options/browser_options.js b/chrome/browser/resources/options/browser_options.js
index c1883c0d42e8a484180f055d13b203e2908ad95b..476435c2c31be273198c0d51d295b6f583e79f68 100644
--- a/chrome/browser/resources/options/browser_options.js
+++ b/chrome/browser/resources/options/browser_options.js
@@ -396,6 +396,14 @@ cr.define('options', function() {
         };
       }
 
+      // Easy Unlock section.
+      if (loadTimeData.getBoolean('easyUnlockEnabled')) {
+        $('easy-unlock-section').hidden = false;
+        $('easy-unlock-setup-button').onclick = function(event) {
+          chrome.send('launchEasyUnlockSetup');
+        };
+      }
+
       // Web Content section.
       $('fontSettingsCustomizeFontsButton').onclick = function(event) {
         OptionsPage.navigateToPage('fonts');
@@ -911,6 +919,16 @@ cr.define('options', function() {
     },
 
     /**
+     * Update the UI depending on whether the current profile has a pairing for
+     * Easy Unlock.
+     * @param {boolean} hasPairing True if the current profile has a pairing.
+     */
+    updateEasyUnlock_: function(hasPairing) {
+      $('easy-unlock-setup').hidden = hasPairing;
+      $('easy-unlock-enable').hidden = !hasPairing;
+    },
+
+    /**
      * Update the UI depending on whether the current profile manages any
      * supervised users.
      * @param {boolean} show True if the current profile manages any supervised
@@ -1691,6 +1709,7 @@ cr.define('options', function() {
     'updateAccountPicture',
     'updateAutoLaunchState',
     'updateDefaultBrowserState',
+    'updateEasyUnlock',
     'updateManagesSupervisedUsers',
     'updateSearchEngines',
     'updateStartupPages',