md-settings: Added settings for fingerprint unlock.

chrome/browser/resources/settings/people_page/lock_screen.js

Index: chrome/browser/resources/settings/people_page/lock_screen.js
diff --git a/chrome/browser/resources/settings/people_page/lock_screen.js b/chrome/browser/resources/settings/people_page/lock_screen.js
index 762bd2cb8a426c762e429159415f752e82664d04..a9c51fb46de26e42e1cbce68d5f0e135d20eab2d 100644
--- a/chrome/browser/resources/settings/people_page/lock_screen.js
+++ b/chrome/browser/resources/settings/people_page/lock_screen.js
@@ -37,6 +37,18 @@ Polymer({
       type: Object,
       observer: 'onSetModesChanged_'
     },
+
+    /**
+     * True if fingerprint unlock settings should be displayed on this machine.
+     * @private
+     */
+    fingerprintUnlockEnabled_: {
+      type: Boolean,
+      value: function() {
+        return loadTimeData.getBoolean('fingerprintUnlockEnabled');
+      },
+      readOnly: true,
+    },
   },
 
   /** selectedUnlockType is defined in LockStateBehavior. */