Add a settings screen that lets the user choose how they unlock their device.

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

Index: chrome/browser/resources/settings/people_page/quick_unlock_password_detect_behavior.js
diff --git a/chrome/browser/resources/settings/people_page/quick_unlock_password_detect_behavior.js b/chrome/browser/resources/settings/people_page/quick_unlock_password_detect_behavior.js
new file mode 100644
index 0000000000000000000000000000000000000000..3b67d36a6a5c0e152b5e0d45eb0cb66aa9d4ed83
--- /dev/null
+++ b/chrome/browser/resources/settings/people_page/quick_unlock_password_detect_behavior.js
@@ -0,0 +1,30 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview
+ * Contains utilities for verifying the user has entered an account password.
+ */
+
+/** @polymerBehavior */
+var QuickUnlockPasswordDetectBehavior = [QuickUnlockRoutingBehavior, {
+  properties: {
+    setModes: Object
+  },
+
+  /**
+   * Verifies that there is an account password available for the
+   * chrome.quickUnlockPrivate.setModes call. If there is no password, this will
+   * redirect to the authenticate screen.
+   */
+  askForPasswordIfUnset: function() {
+    if (!this.setModes) {
+      this.currentRoute = {
+        page: 'basic',
+        section: 'people',
+        subpage: [QuickUnlockScreen.AUTHENTICATE]
+      };
+    }
+  }
+}];