Introduce new chrome.easyUnlock APIs for getting the sign-in challenge and using it to sign-in the …

chrome/common/extensions/api/easy_unlock_private.idl

 // Copyright 2014 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.
 
 // <code>chrome.easyUnlockPrivate</code> API that provides hooks to Chrome to
 // be used by Easy Unlock component app.
 [nodoc] namespace easyUnlockPrivate {
   // Signature algorithms supported by the crypto library methods used by
   // Easy Unlock.
   enum SignatureType {
@@ skipping 241 matching lines @@
     static void clearPermitAccess(optional EmptyCallback callback);
 
     // Saves the remote device list.
     // |devices|: The list of remote devices to be saved.
     // |callback|: Called to indicate success or failure.
     static void setRemoteDevices(Device[] devices,
                                  optional EmptyCallback callback);
 
     // Gets the remote device list.
     static void getRemoteDevices(GetRemoteDevicesCallback callback);
+
+    // Gets the sign-in challenge for the current user.
+    static void getSignInChallenge(DataCallback callback);
+
+    // Tries to sign-in the current user with a secret obtained by decrypting
+    // the sign-in challenge. Check chrome.runtime.lastError for failures. Upon
+    // success, the user session will be started.
+    static void trySignInSecret(ArrayBuffer signInSecret,
+                                EmptyCallback callback);
   };
 };