blink: permissions: cleanup and add tests for revoke

public/platform/modules/permissions/WebPermissionClient.h

 // Copyright 2015 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.
 
 #ifndef WebPermissionClient_h
 #define WebPermissionClient_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/modules/permissions/WebPermissionStatus.h"
 #include "public/platform/modules/permissions/WebPermissionType.h"
 
 namespace blink {
 
-// WebPermissionQueryCallback is kept for backward compatibility
-using WebPermissionQueryCallback = WebCallbacks<WebPermissionStatus, void>;
-using WebPermissionCallback = WebPermissionQueryCallback;
+using WebPermissionCallback = WebCallbacks<WebPermissionStatus, void>;
 
 class WebPermissionObserver;
 class WebURL;
 
 // This client is expected to do general permission handling. From simple
 // permission query to requesting new permissions.
 class WebPermissionClient {
 public:
     // Query the permission status of a given origin for a specific permission.
     virtual void queryPermission(WebPermissionType, const WebURL&, WebPermissionCallback*) { }
@@ skipping 11 matching lines @@
     // observer.
     virtual void stopListening(WebPermissionObserver*) { }
 
 protected:
     virtual ~WebPermissionClient() { }
 };
 
 } // namespace blink
 
 #endif // WebPermissionClient_h