Implement the private API for quick unlock.

chrome/common/extensions/api/quick_unlock_private.idl

+// 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.
+
+// Use the <code>chrome.quickUnlockPrivate</code> API to manage quick unlock.
+[platforms=("chromeos"),
+ implemented_in="chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api.h"]
+namespace quickUnlockPrivate {
+  enum QuickUnlockMode {
+    PIN
+  };
+
+  callback BooleanResultCallback = void (boolean value);
+  callback ModesCallback = void (QuickUnlockMode[] modes);
+
+  interface Functions {
+    // Checks to see if the given password is correct for the currently active
+    // profile. This only checks against the account password, not, for
+    // example, the PIN.
+    static void checkPassword(DOMString password,
+                              BooleanResultCallback callback);
+
+    // Returns the set of quick unlock modes that are available for the user to
+    // use. Some quick unlock modes may be disabled by policy.
+    static void getAvailableModes(ModesCallback onComplete);
+
+    // Set the quick unlock modes that are active/enabled. Quick unlock can be
+    // disabled by calling this with an empty |modes| array.
+    //
+    // To keep the password for one of the modes the same, pass an empty string.
+    static void setModes(QuickUnlockMode[] modes, DOMString[] passwords,
+                         BooleanResultCallback onComplete);
+
+    // Returns the quick unlock modes that are currently enabled and usable on
+    // the lock screen.
+    static void getActiveModes(ModesCallback onComplete);
+  };
+};