|  | /* | 
|  | * Copyright (C) 2015 The Android Open Source Project | 
|  | * | 
|  | * Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | * you may not use this file except in compliance with the License. | 
|  | * You may obtain a copy of the License at | 
|  | * | 
|  | *      http://www.apache.org/licenses/LICENSE-2.0 | 
|  | * | 
|  | * Unless required by applicable law or agreed to in writing, software | 
|  | * distributed under the License is distributed on an "AS IS" BASIS, | 
|  | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | * See the License for the specific language governing permissions and | 
|  | * limitations under the License. | 
|  | */ | 
|  |  | 
|  | package android.webkit; | 
|  |  | 
|  | import android.annotation.SystemApi; | 
|  |  | 
|  | /** | 
|  | * Enables the token binding procotol, and provides access to the keys. See | 
|  | * https://tools.ietf.org/html/draft-ietf-tokbind-protocol-03 | 
|  | * | 
|  | * All methods are required to be called on the UI thread where WebView is | 
|  | * attached to the View hierarchy. | 
|  | * @hide | 
|  | * @deprecated this is no longer supported. | 
|  | */ | 
|  | @SystemApi | 
|  | @Deprecated | 
|  | public abstract class TokenBindingService { | 
|  | } |