Allow script to request durable storage permission (chrome side)

content/child/permissions/permission_dispatcher.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 CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_H_
 #define CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 19 matching lines @@
   // Returns whether the given WebPermissionType is observable. Some types have
   // static values that never changes.
   static bool IsObservable(blink::WebPermissionType type);
 
   // The caller must guarantee that |service_registry| will have a lifetime
   // larger than this instance of PermissionDispatcher.
   explicit PermissionDispatcher(ServiceRegistry* service_registry);
   virtual ~PermissionDispatcher();
 
   // blink::WebPermissionClient implementation.
+  virtual void requestDurablePermission(const blink::WebURL&,
+      blink::WebPermissionQueryCallback*);
   virtual void queryPermission(blink::WebPermissionType type,
                                const blink::WebURL& origin,
                                blink::WebPermissionQueryCallback* callback);
   virtual void startListening(blink::WebPermissionType type,
                               const blink::WebURL& origin,
                               blink::WebPermissionObserver* observer);
   virtual void stopListening(blink::WebPermissionObserver* observer);
 
   // The following methods must be called by workers on the main thread.
   void QueryPermissionForWorker(blink::WebPermissionType type,
@@ skipping 66 matching lines @@
 
   ServiceRegistry* service_registry_;
   PermissionServicePtr permission_service_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionDispatcher);
 };
 
 }  // namespace content
 
 #endif // CONTENT_CHILD_PERMISSIONS_PERMISSION_DISPATCHER_H_