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 f296363be34d22c6969668a110d742ddcf0a9617..37a8baf2aa581a769529256259f0128b62a6adba 100644
--- a/chrome/browser/resources/settings/people_page/lock_screen.js
+++ b/chrome/browser/resources/settings/people_page/lock_screen.js
@@ -37,6 +37,14 @@ Polymer({
       type: Object,
       observer: 'onSetModesChanged_'
     },
+
+    /**
+     * True if fingerprint unlock settings should be displayed on this machine.
+     * @private
+     */
+    fingerprintUnlockEnabled: {
+      type: Boolean
+    },
   },
 
   /** selectedUnlockType is defined in LockStateBehavior. */